diff --git a/service-a/src/app.module.ts b/service-a/src/app.module.ts
index ba4eccf4..541eebc9 100644
--- a/service-a/src/app.module.ts
+++ b/service-a/src/app.module.ts
@@ -2,16 +2,12 @@ import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
 import { MongooseModule } from '@nestjs/mongoose';
-import { UsersModule } from './users/users.module';
 import { BooksModule } from './books/books.module';
-import { CategoriesModule } from './categories/categories.module';
 
 @Module({
   imports: [ 
     MongooseModule.forRoot(`mongodb+srv://proyecto_4:proyecto_4@proyecto4.yv4fb.mongodb.net/servicio_books?retryWrites=true&w=majority`),
     BooksModule, 
-    UsersModule, 
-    CategoriesModule, 
   ],
   controllers: [AppController],
   providers: [AppService],
diff --git a/service-a/src/books/books.controller.ts b/service-a/src/books/books.controller.ts
index babb983a..109fa967 100644
--- a/service-a/src/books/books.controller.ts
+++ b/service-a/src/books/books.controller.ts
@@ -36,8 +36,8 @@ export class BooksController {
   }
 
   @Patch(':id')
-  update(@Param('id') id: string, @Body() updateBookDto: UpdateBookDto) {
-    return this.booksService.update(id, updateBookDto);
+  update(@Param('id') id: string, @Body() book: BookDocument) {
+    return this.booksService.update(id, book);
   }
 
   @Delete(':id')
diff --git a/service-a/src/books/books.service.ts b/service-a/src/books/books.service.ts
index 0f65f1af..d506c6c0 100644
--- a/service-a/src/books/books.service.ts
+++ b/service-a/src/books/books.service.ts
@@ -27,8 +27,8 @@ export class BooksService {
     return this.bookModel.findOne({ _id: id }).exec();
   }
 
-  async update(id: string, updateBookDto: UpdateBookDto) {
-    return this.bookModel.findOneAndUpdate({ _id: id }, updateBookDto, {
+  async update(id: string, book: BookDocument) {
+    return this.bookModel.findOneAndUpdate({ _id: id }, book, {
       new: true,
     });
   }
diff --git a/service-a/src/categories/categories.controller.spec.ts b/service-a/src/categories/categories.controller.spec.ts
deleted file mode 100644
index 66257dec..00000000
--- a/service-a/src/categories/categories.controller.spec.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { CategoriesController } from './categories.controller';
-import { CategoriesService } from './categories.service';
-
-describe('CategoriesController', () => {
-  let controller: CategoriesController;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      controllers: [CategoriesController],
-      providers: [CategoriesService],
-    }).compile();
-
-    controller = module.get<CategoriesController>(CategoriesController);
-  });
-
-  it('should be defined', () => {
-    expect(controller).toBeDefined();
-  });
-});
diff --git a/service-a/src/categories/categories.controller.ts b/service-a/src/categories/categories.controller.ts
deleted file mode 100644
index 8c865d66..00000000
--- a/service-a/src/categories/categories.controller.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import { Controller, Get, Post, Body, Patch, Param, Delete } from '@nestjs/common';
-import { CategoriesService } from './categories.service';
-import { CreateCategoryDto } from './dto/create-category.dto';
-import { UpdateCategoryDto } from './dto/update-category.dto';
-
-@Controller('categories')
-export class CategoriesController {
-  constructor(private readonly categoriesService: CategoriesService) {}
-
-  @Post()
-  create(@Body() createCategoryDto: CreateCategoryDto) {
-    return this.categoriesService.create(createCategoryDto);
-  }
-
-  @Get()
-  findAll() {
-    return this.categoriesService.findAll();
-  }
-
-  @Get(':id')
-  findOne(@Param('id') id: string) {
-    return this.categoriesService.findOne(+id);
-  }
-
-  @Patch(':id')
-  update(@Param('id') id: string, @Body() updateCategoryDto: UpdateCategoryDto) {
-    return this.categoriesService.update(+id, updateCategoryDto);
-  }
-
-  @Delete(':id')
-  remove(@Param('id') id: string) {
-    return this.categoriesService.remove(+id);
-  }
-}
diff --git a/service-a/src/categories/categories.module.ts b/service-a/src/categories/categories.module.ts
deleted file mode 100644
index 8776b448..00000000
--- a/service-a/src/categories/categories.module.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import { Module } from '@nestjs/common';
-import { CategoriesService } from './categories.service';
-import { CategoriesController } from './categories.controller';
-
-@Module({
-  controllers: [CategoriesController],
-  providers: [CategoriesService]
-})
-export class CategoriesModule {}
diff --git a/service-a/src/categories/categories.service.spec.ts b/service-a/src/categories/categories.service.spec.ts
deleted file mode 100644
index 9095d781..00000000
--- a/service-a/src/categories/categories.service.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { CategoriesService } from './categories.service';
-
-describe('CategoriesService', () => {
-  let service: CategoriesService;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [CategoriesService],
-    }).compile();
-
-    service = module.get<CategoriesService>(CategoriesService);
-  });
-
-  it('should be defined', () => {
-    expect(service).toBeDefined();
-  });
-});
diff --git a/service-a/src/categories/categories.service.ts b/service-a/src/categories/categories.service.ts
deleted file mode 100644
index 04d46417..00000000
--- a/service-a/src/categories/categories.service.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import { Injectable } from '@nestjs/common';
-import { CreateCategoryDto } from './dto/create-category.dto';
-import { UpdateCategoryDto } from './dto/update-category.dto';
-
-@Injectable()
-export class CategoriesService {
-  create(createCategoryDto: CreateCategoryDto) {
-    return 'This action adds a new category';
-  }
-
-  findAll() {
-    return `This action returns all categories`;
-  }
-
-  findOne(id: number) {
-    return `This action returns a #${id} category`;
-  }
-
-  update(id: number, updateCategoryDto: UpdateCategoryDto) {
-    return `This action updates a #${id} category`;
-  }
-
-  remove(id: number) {
-    return `This action removes a #${id} category`;
-  }
-}
diff --git a/service-a/src/categories/dto/create-category.dto.ts b/service-a/src/categories/dto/create-category.dto.ts
deleted file mode 100644
index 4f8ca2fc..00000000
--- a/service-a/src/categories/dto/create-category.dto.ts
+++ /dev/null
@@ -1 +0,0 @@
-export class CreateCategoryDto {}
diff --git a/service-a/src/categories/dto/update-category.dto.ts b/service-a/src/categories/dto/update-category.dto.ts
deleted file mode 100644
index d713b9b9..00000000
--- a/service-a/src/categories/dto/update-category.dto.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import { PartialType } from '@nestjs/swagger';
-import { CreateCategoryDto } from './create-category.dto';
-
-export class UpdateCategoryDto extends PartialType(CreateCategoryDto) {}
diff --git a/service-a/src/categories/schemas/category.schema.ts b/service-a/src/categories/schemas/category.schema.ts
deleted file mode 100644
index 6f4fd523..00000000
--- a/service-a/src/categories/schemas/category.schema.ts
+++ /dev/null
@@ -1 +0,0 @@
-export class Category {}
diff --git a/service-a/src/users/dto/create-user.dto.ts b/service-a/src/users/dto/create-user.dto.ts
deleted file mode 100644
index 0311be13..00000000
--- a/service-a/src/users/dto/create-user.dto.ts
+++ /dev/null
@@ -1 +0,0 @@
-export class CreateUserDto {}
diff --git a/service-a/src/users/dto/update-user.dto.ts b/service-a/src/users/dto/update-user.dto.ts
deleted file mode 100644
index 78ab602d..00000000
--- a/service-a/src/users/dto/update-user.dto.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-import { PartialType } from '@nestjs/swagger';
-import { CreateUserDto } from './create-user.dto';
-
-export class UpdateUserDto extends PartialType(CreateUserDto) {}
diff --git a/service-a/src/users/schemas/user.schema.ts b/service-a/src/users/schemas/user.schema.ts
deleted file mode 100644
index 4f82c145..00000000
--- a/service-a/src/users/schemas/user.schema.ts
+++ /dev/null
@@ -1 +0,0 @@
-export class User {}
diff --git a/service-a/src/users/users.controller.spec.ts b/service-a/src/users/users.controller.spec.ts
deleted file mode 100644
index a76d3103..00000000
--- a/service-a/src/users/users.controller.spec.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { UsersController } from './users.controller';
-import { UsersService } from './users.service';
-
-describe('UsersController', () => {
-  let controller: UsersController;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      controllers: [UsersController],
-      providers: [UsersService],
-    }).compile();
-
-    controller = module.get<UsersController>(UsersController);
-  });
-
-  it('should be defined', () => {
-    expect(controller).toBeDefined();
-  });
-});
diff --git a/service-a/src/users/users.controller.ts b/service-a/src/users/users.controller.ts
deleted file mode 100644
index 3eca7ebd..00000000
--- a/service-a/src/users/users.controller.ts
+++ /dev/null
@@ -1,34 +0,0 @@
-import { Controller, Get, Post, Body, Patch, Param, Delete } from '@nestjs/common';
-import { UsersService } from './users.service';
-import { CreateUserDto } from './dto/create-user.dto';
-import { UpdateUserDto } from './dto/update-user.dto';
-
-@Controller('users')
-export class UsersController {
-  constructor(private readonly usersService: UsersService) {}
-
-  @Post()
-  create(@Body() createUserDto: CreateUserDto) {
-    return this.usersService.create(createUserDto);
-  }
-
-  @Get()
-  findAll() {
-    return this.usersService.findAll();
-  }
-
-  @Get(':id')
-  findOne(@Param('id') id: string) {
-    return this.usersService.findOne(+id);
-  }
-
-  @Patch(':id')
-  update(@Param('id') id: string, @Body() updateUserDto: UpdateUserDto) {
-    return this.usersService.update(+id, updateUserDto);
-  }
-
-  @Delete(':id')
-  remove(@Param('id') id: string) {
-    return this.usersService.remove(+id);
-  }
-}
diff --git a/service-a/src/users/users.module.ts b/service-a/src/users/users.module.ts
deleted file mode 100644
index 51f12f03..00000000
--- a/service-a/src/users/users.module.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import { Module } from '@nestjs/common';
-import { UsersService } from './users.service';
-import { UsersController } from './users.controller';
-
-@Module({
-  controllers: [UsersController],
-  providers: [UsersService]
-})
-export class UsersModule {}
diff --git a/service-a/src/users/users.service.spec.ts b/service-a/src/users/users.service.spec.ts
deleted file mode 100644
index 62815ba6..00000000
--- a/service-a/src/users/users.service.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing';
-import { UsersService } from './users.service';
-
-describe('UsersService', () => {
-  let service: UsersService;
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [UsersService],
-    }).compile();
-
-    service = module.get<UsersService>(UsersService);
-  });
-
-  it('should be defined', () => {
-    expect(service).toBeDefined();
-  });
-});
diff --git a/service-a/src/users/users.service.ts b/service-a/src/users/users.service.ts
deleted file mode 100644
index 0a55903d..00000000
--- a/service-a/src/users/users.service.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import { Injectable } from '@nestjs/common';
-import { CreateUserDto } from './dto/create-user.dto';
-import { UpdateUserDto } from './dto/update-user.dto';
-
-@Injectable()
-export class UsersService {
-  create(createUserDto: CreateUserDto) {
-    return 'This action adds a new user';
-  }
-
-  findAll() {
-    return `This action returns all users`;
-  }
-
-  findOne(id: number) {
-    return `This action returns a #${id} user`;
-  }
-
-  update(id: number, updateUserDto: UpdateUserDto) {
-    return `This action updates a #${id} user`;
-  }
-
-  remove(id: number) {
-    return `This action removes a #${id} user`;
-  }
-}