diff --git a/SpringApp/library/src/main/java/com/ip/library/LibraryApplication.java b/SpringApp/library/src/main/java/com/ip/library/LibraryApplication.java
index 314e44f..1407d9e 100644
--- a/SpringApp/library/src/main/java/com/ip/library/LibraryApplication.java
+++ b/SpringApp/library/src/main/java/com/ip/library/LibraryApplication.java
@@ -1,13 +1,64 @@
 package com.ip.library;
 
+import org.modelmapper.internal.util.Objects;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
+import com.ip.library.authors.model.AuthorEntity;
+import com.ip.library.authors.service.AuthorService;
+import com.ip.library.books.model.BookEntity;
+import com.ip.library.books.service.BookService;
+import com.ip.library.types.model.TypeEntity;
+import com.ip.library.types.service.TypeService;
+import com.ip.library.users.model.UserEntity;
+import com.ip.library.users.service.UserService;
+
+
 @SpringBootApplication
-public class LibraryApplication {
+public class LibraryApplication implements CommandLineRunner {
+	private final Logger log = LoggerFactory.getLogger(LibraryApplication.class);
+
+	AuthorService authorService;
+	TypeService typeService;
+	BookService bookService;
+	UserService userService;
+
+	public LibraryApplication (AuthorService authorService, TypeService typeService, 
+			BookService bookService, UserService userService) {
+		this.authorService = authorService;
+		this.typeService = typeService;
+		this.bookService = bookService;
+		this.userService = userService;
+	}
 
 	public static void main(String[] args) {
 		SpringApplication.run(LibraryApplication.class, args);
 	}
 
+	@Override
+	public void run(String... args) throws Exception {
+		if (args.length > 0 && args[0].equals("--populate")) {
+			log.info("Create default types values");
+			final var type1 = typeService.create(new TypeEntity(null, "type1"));
+			final var type2 = typeService.create(new TypeEntity(null, "type2"));
+			
+			log.info("Create default authors values");
+			final var author1 = authorService.create(new AuthorEntity(null, "author1"));
+			final var author2 = authorService.create(new AuthorEntity(null, "author2"));
+			
+			log.info("Create default users values");
+			final var user1 = userService.create(new UserEntity(null, "user1", "123", "user"));
+			final var user2 = userService.create(new UserEntity(null, "user2", "123", "user"));
+			final var admin1 = userService.create(new UserEntity(null, "admin1", "123", "admin"));
+			
+			log.info("Create default books values");
+			final var book1 = bookService.create(new BookEntity(null, "book1", type1, author1));
+			final var book2 = bookService.create(new BookEntity(null, "book2", type1, author2));
+			final var book3 = bookService.create(new BookEntity(null, "book3", type2, author1));
+			final var book4 = bookService.create(new BookEntity(null, "book4", type2, author2));
+		}
+	}
 }
diff --git a/SpringApp/library/src/main/java/com/ip/library/books/api/BookDto.java b/SpringApp/library/src/main/java/com/ip/library/books/api/BookDto.java
index 887caed..c8e54e9 100644
--- a/SpringApp/library/src/main/java/com/ip/library/books/api/BookDto.java
+++ b/SpringApp/library/src/main/java/com/ip/library/books/api/BookDto.java
@@ -3,10 +3,13 @@ package com.ip.library.books.api;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
 
 public class BookDto {
     private Long id;
+    @NotBlank
+    private String name;
     @NotNull
     @Min(1)
     private Long typeId;
diff --git a/SpringApp/library/src/main/java/com/ip/library/books/model/BookEntity.java b/SpringApp/library/src/main/java/com/ip/library/books/model/BookEntity.java
index e0ec194..e208a76 100644
--- a/SpringApp/library/src/main/java/com/ip/library/books/model/BookEntity.java
+++ b/SpringApp/library/src/main/java/com/ip/library/books/model/BookEntity.java
@@ -7,6 +7,7 @@ import com.ip.library.types.model.TypeEntity;
 import com.ip.library.authors.model.AuthorEntity;
 
 public class BookEntity extends BaseEntity {
+    private String name;
     private TypeEntity type;
     private AuthorEntity author;
 
@@ -14,12 +15,21 @@ public class BookEntity extends BaseEntity {
         super();
     }
 
-    public BookEntity(Long id, TypeEntity type, AuthorEntity author) {
+    public BookEntity(Long id, String name, TypeEntity type, AuthorEntity author) {
         super(id);
+        this.name = name;
         this.type = type;
         this.author = author;
     }
 
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
     public TypeEntity getType() {
         return type;
     }
@@ -49,6 +59,7 @@ public class BookEntity extends BaseEntity {
             return false;
         final BookEntity other = (BookEntity) obj;
         return Objects.equals(other.getId(), id)
+                && Objects.equals(other.getName(), name)
                 && Objects.equals(other.getType(), type)
                 && Objects.equals(other.getAuthor(), author);
     }