diff --git a/source/src/main/java/one/nem/lacerta/source/database/dao/LibraryDao.java b/source/src/main/java/one/nem/lacerta/source/database/dao/LibraryDao.java
index ce86fdcc..87a05162 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/dao/LibraryDao.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/dao/LibraryDao.java
@@ -1,4 +1,24 @@
 package one.nem.lacerta.source.database.dao;
 
+import androidx.room.Dao;
+import androidx.room.Query;
+
+import java.util.List;
+
+import one.nem.lacerta.source.database.entity.Library;
+
+@Dao
 public interface LibraryDao {
+
+    @Query("SELECT * FROM library WHERE id = :id")
+    Library findById(String id);
+
+    @Query("SELECT * FROM library")
+    List<Library> findAll();
+
+    @Query("SELECT * FROM library WHERE id IN (:ids)")
+    List<Library> findByIds(List<String> ids);
+
+    // WIP
+    // TODO-rca: Insert, Update, Delete
 }