diff --git a/src/main/java/com/jesuspinar/booksearch/dao/BookDao.java b/src/main/java/com/jesuspinar/booksearch/dao/BookDao.java
new file mode 100644
index 0000000..092252e
--- /dev/null
+++ b/src/main/java/com/jesuspinar/booksearch/dao/BookDao.java
@@ -0,0 +1,74 @@
+package com.jesuspinar.booksearch.dao;
+
+import com.jesuspinar.booksearch.config.AppConfig;
+import com.jesuspinar.booksearch.controller.CsvParser;
+import com.jesuspinar.booksearch.model.Book;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import javax.annotation.PostConstruct;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class BookDao implements IBookDao{
+    
+    public List<Book> books = new ArrayList<>();
+
+    @Autowired
+    private AppConfig appConfig;
+    
+    @PostConstruct
+    public void init() {
+        books = CsvParser.readFile(appConfig.getFile(), appConfig.getSeparator(), appConfig.getListSeparator());
+    }
+    
+    @Override
+    public Book findById(long id) {
+        Optional<Book> result = books
+                .stream()
+                .filter(f -> f.getId() == id)
+                .findFirst();
+        return result.orElse(null);
+    }
+
+    @Override
+    public Collection<Book> findAll() {
+        return books;
+    }
+
+    @Override
+    public void insert(Book book) {
+        books.add(book);
+    }
+
+    @Override
+    public void edit(Book book) {
+        int index = getIndexOf(book.getId());
+        if (index != -1)
+            books.set(index, book);
+    }
+
+    @Override
+    public void delete(long id) {
+        int index = getIndexOf(id);
+        if (index != -1)
+            books.remove(index);
+    }
+
+    private int getIndexOf(long id) {
+        boolean find = false;
+        int index = 0;
+
+        while (!find && index < books.size()) {
+            if (books.get(index).getId() == id)
+                find = true;
+            else
+                index++;
+        }
+
+        return (find) ? index : -1;
+    }
+}
diff --git a/src/main/java/com/jesuspinar/booksearch/dao/IBookDao.java b/src/main/java/com/jesuspinar/booksearch/dao/IBookDao.java
new file mode 100644
index 0000000..f3cc818
--- /dev/null
+++ b/src/main/java/com/jesuspinar/booksearch/dao/IBookDao.java
@@ -0,0 +1,15 @@
+package com.jesuspinar.booksearch.dao;
+
+import com.jesuspinar.booksearch.model.Book;
+
+import java.util.Collection;
+
+public interface IBookDao {
+
+    public Book findById(long id);
+    public Collection<Book> findAll();
+    public void insert(Book book);
+    public void edit(Book book);
+    public void delete(long id);
+
+}
diff --git a/src/main/java/com/jesuspinar/booksearch/model/Book.java b/src/main/java/com/jesuspinar/booksearch/model/Book.java
index fa18664..28be50c 100644
--- a/src/main/java/com/jesuspinar/booksearch/model/Book.java
+++ b/src/main/java/com/jesuspinar/booksearch/model/Book.java
@@ -15,7 +15,7 @@ public class Book {
     private String publisher;
 
     public Book( String title, List<String> authors, String genre,String height, String publisher) {
-        this.id = AUTO_ID++;
+        this.id = ++AUTO_ID;
         this.title = title;
         this.authors = authors;
         this.genre = genre;