diff --git a/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java b/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
new file mode 100644
index 00000000..408a9171
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/LacertaLibrary.java
@@ -0,0 +1,22 @@
+package one.nem.lacerta.data;
+
+import one.nem.lacerta.model.ListItemType;
+
+import one.nem.lacerta.model.LibraryItemPage;
+import one.nem.lacerta.model.document.DocumentDetail;
+
+public interface LacertaLibrary {
+
+    // Get History
+    LibraryItemPage getRecentDocument(int limit);
+    LibraryItemPage getRecentDocument(int limit, int offset);
+
+    // Get Library page
+    LibraryItemPage getLibraryPage(int limit);
+    LibraryItemPage getLibraryPage(int limit, int offset);
+    LibraryItemPage getLibraryPage(String pageId, int limit);
+    LibraryItemPage getLibraryPage(String pageId, int limit, int offset);
+
+    // GetDocument
+    DocumentDetail getDocumentDetailById(String id);
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java b/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java
new file mode 100644
index 00000000..b3e9c855
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/impl/LacertaLibraryImpl.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.data.impl;
+
+public class LacertaLibraryImpl {
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/module/LacertaLibraryModule.java b/data/src/main/java/one/nem/lacerta/data/module/LacertaLibraryModule.java
new file mode 100644
index 00000000..889a66ef
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/module/LacertaLibraryModule.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.data.module;
+
+public class LacertaLibraryModule {
+}
diff --git a/model/src/main/java/one/nem/lacerta/model/LibraryItemPage.java b/model/src/main/java/one/nem/lacerta/model/LibraryItemPage.java
new file mode 100644
index 00000000..aed41a09
--- /dev/null
+++ b/model/src/main/java/one/nem/lacerta/model/LibraryItemPage.java
@@ -0,0 +1,28 @@
+package one.nem.lacerta.model;
+
+import java.util.ArrayList;
+
+public class LibraryItemPage {
+
+    String pageTitle;
+    String pageId;
+    ArrayList<ListItem> listItems;
+
+    public LibraryItemPage(String pageTitle, String pageId, ArrayList<ListItem> listItems) {
+        this.pageTitle = pageTitle;
+        this.pageId = pageId;
+        this.listItems = listItems;
+    }
+
+    public String getPageTitle() {
+        return pageTitle;
+    }
+
+    public String getPageId() {
+        return pageId;
+    }
+
+    public ArrayList<ListItem> getListItems() {
+        return listItems;
+    }
+}