diff --git a/SpringApp/library/src/main/java/com/ip/library/books/service/BookService.java b/SpringApp/library/src/main/java/com/ip/library/books/service/BookService.java
index f0dbcbd..629fc37 100644
--- a/SpringApp/library/src/main/java/com/ip/library/books/service/BookService.java
+++ b/SpringApp/library/src/main/java/com/ip/library/books/service/BookService.java
@@ -33,6 +33,10 @@ public class BookService {
         return result;
     }
 
+    public List<BookEntity> getAll() {
+        return repository.getAll();
+    }
+
     public BookEntity get(Long id) {
         return Optional.ofNullable(repository.get(id))
                 .orElseThrow(() -> new NotFoundException(id));
diff --git a/SpringApp/library/src/test/java/com/ip/library/LibraryApplicationTests.java b/SpringApp/library/src/test/java/com/ip/library/LibraryApplicationTests.java
index c9eb0c4..9764724 100644
--- a/SpringApp/library/src/test/java/com/ip/library/LibraryApplicationTests.java
+++ b/SpringApp/library/src/test/java/com/ip/library/LibraryApplicationTests.java
@@ -1,13 +1,75 @@
 package com.ip.library;
 
+import org.junit.jupiter.api.Order;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestMethodOrder;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Assertions;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import com.ip.library.core.error.NotFoundException;
+import com.ip.library.types.model.TypeEntity;
+import com.ip.library.types.service.TypeService;
+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;
+
 @SpringBootTest
+@TestMethodOrder(OrderAnnotation.class)
 class LibraryApplicationTests {
+	@Autowired
+	private BookService bookService;
+	@Autowired
+	private TypeService typeService;
+	@Autowired
+	private AuthorService authorService;
 
 	@Test
-	void contextLoads() {
+	void getTest() {
+		Assertions.assertThrows(NotFoundException.class, () -> bookService.get(0L));
 	}
 
+	@Test
+	@Order(1)
+	void createTest() {
+		var type1 = typeService.create(new TypeEntity(null, "type1"));
+		var type2 = typeService.create(new TypeEntity(null, "type2"));
+		var author1 = authorService.create(new AuthorEntity(null, "author1"));
+		var author2 = authorService.create(new AuthorEntity(null, "author2"));
+		bookService.create(new BookEntity(null, "book1", type1, author1));
+		bookService.create(new BookEntity(null, "book2", type2, author2));
+		final BookEntity last = bookService.create(new BookEntity(null, "book3", type2, author1));
+		Assertions.assertEquals(3, bookService.getAll().size());
+		Assertions.assertEquals(last, bookService.get(3L));
+	}
+
+	@Test
+	@Order(2)
+	void updateTest() {
+		final BookEntity entity = bookService.get(3L);
+		final String oldName = entity.getName();
+		final String test = oldName + "TEST";
+		final BookEntity newEntity = bookService.update(3L, new BookEntity(1L, test, entity.getType(), entity.getAuthor()));
+		Assertions.assertEquals(3, bookService.getAll().size());
+		Assertions.assertEquals(newEntity, bookService.get(3L));
+		Assertions.assertEquals(test, newEntity.getName());
+		Assertions.assertNotEquals(oldName, newEntity.getName());
+	}
+
+	@Test
+	@Order(3)
+	void deleteTest() {
+		bookService.delete(3L);
+		Assertions.assertEquals(2, bookService.getAll().size());
+		final BookEntity last = bookService.get(2L);
+		Assertions.assertEquals(2L, last.getId());
+
+		var type2 = typeService.create(new TypeEntity(null, "type2"));
+		var author1 = authorService.create(new AuthorEntity(null, "author1"));
+		final BookEntity newEntity = bookService.create(new BookEntity(null, "book3", type2, author1));
+		Assertions.assertEquals(3, bookService.getAll().size());
+		Assertions.assertEquals(4L, newEntity.getId());
+	}
 }