diff --git a/include/manager.h b/include/manager.h
index 99bfea975..0e980b341 100644
--- a/include/manager.h
+++ b/include/manager.h
@@ -34,6 +34,24 @@ class xml_document;
 namespace kiwix
 {
 
+class LibraryManipulator {
+ public:
+  virtual ~LibraryManipulator() {}
+  virtual bool addBookToLibrary(Book book) = 0;
+};
+
+class DefaultLibraryManipulator : public LibraryManipulator {
+ public:
+  DefaultLibraryManipulator(Library* library) :
+    library(library) {}
+  virtual ~DefaultLibraryManipulator() {}
+  bool addBookToLibrary(Book book) {
+    return library->addBook(book);
+  }
+ private:
+   kiwix::Library* library;
+};
+
 /**
  * A tool to manage a `Library`.
  *
@@ -43,6 +61,7 @@ namespace kiwix
 class Manager
 {
  public:
+  Manager(LibraryManipulator* manipulator);
   Manager(Library* library);
   ~Manager();
 
@@ -94,27 +113,6 @@ class Manager
    */
   bool readOpds(const std::string& content, const std::string& urlHost);
 
-  /**
-   * Set the path of the external fulltext index associated to a book.
-   *
-   * @param id The id of the book to set.
-   * @param path The path of the external fullext index.
-   * @param supportedIndexType The type of the fulltext index.
-   * @return True if the book is in the library.
-   */
-  bool setBookIndex(const std::string& id,
-                    const std::string& path,
-                    const supportedIndexType type = XAPIAN);
-
-  /**
-   * Set the path of the zim file associated to a book.
-   *
-   * @param id The id of the book to set.
-   * @param path The path of the zim file.
-   * @return True if the book is in the library.
-   */
-  bool setBookPath(const std::string& id, const std::string& path);
-
   /**
    * Add a book to the library.
    *
@@ -201,7 +199,8 @@ class Manager
   std::vector<std::string> bookIdList;
 
  protected:
-  kiwix::Library* library;
+  kiwix::LibraryManipulator* manipulator;
+  bool mustDeleteManipulator;
 
   bool readBookFromPath(const std::string& path, Book* book);
   bool parseXmlDom(const pugi::xml_document& doc,
diff --git a/src/manager.cpp b/src/manager.cpp
index e85081dc1..41709ef00 100644
--- a/src/manager.cpp
+++ b/src/manager.cpp
@@ -25,14 +25,26 @@
 namespace kiwix
 {
 /* Constructor */
-Manager::Manager(Library* library):
+Manager::Manager(LibraryManipulator* manipulator):
   writableLibraryPath(""),
-  library(library)
+  manipulator(manipulator),
+  mustDeleteManipulator(false)
 {
 }
+
+Manager::Manager(Library* library) :
+  writableLibraryPath(""),
+  manipulator(new DefaultLibraryManipulator(library)),
+  mustDeleteManipulator(true)
+{
+}
+
 /* Destructor */
 Manager::~Manager()
 {
+  if (mustDeleteManipulator) {
+    delete manipulator;
+  }
 }
 bool Manager::parseXmlDom(const pugi::xml_document& doc,
                           const bool readOnly,
@@ -44,24 +56,20 @@ bool Manager::parseXmlDom(const pugi::xml_document& doc,
 
   for (pugi::xml_node bookNode = libraryNode.child("book"); bookNode;
        bookNode = bookNode.next_sibling("book")) {
-    bool ok = true;
     kiwix::Book book;
 
     book.setReadOnly(readOnly);
-    book.updateFromXml(bookNode, removeLastPathElement(libraryPath, true, false));
+    book.updateFromXml(bookNode,
+                       removeLastPathElement(libraryPath, true, false));
 
     /* Update the book properties with the new importer */
     if (libraryVersion.empty()
         || atoi(libraryVersion.c_str()) <= atoi(KIWIX_LIBRARY_VERSION)) {
-      ok = false;
       if (!book.getPath().empty()) {
-        ok = this->readBookFromPath(book.getPath(), &book);
+        this->readBookFromPath(book.getPath(), &book);
       }
     }
-
-    if (ok) {
-      library->addBook(book);
-    }
+    manipulator->addBookToLibrary(book);
   }
 
   return true;
@@ -114,7 +122,7 @@ bool Manager::parseOpdsDom(const pugi::xml_document& doc, const std::string& url
     }
 
     /* Update the book properties with the new importer */
-    library->addBook(book);
+    manipulator->addBookToLibrary(book);
   }
 
   return true;
@@ -188,7 +196,7 @@ std::string Manager::addBookFromPathAndGetId(const std::string& pathToOpen,
         || (checkMetaData && !book.getTitle().empty() && !book.getLanguage().empty()
             && !book.getDate().empty())) {
       book.setUrl(url);
-      library->addBook(book);
+      manipulator->addBookToLibrary(book);
       return book.getId();
     }
   }
@@ -223,33 +231,4 @@ bool Manager::readBookFromPath(const std::string& path, kiwix::Book* book)
   return true;
 }
 
-bool Manager::setBookIndex(const std::string& id,
-                           const std::string& path,
-                           const supportedIndexType type)
-try {
-  auto book = library->getBookById(id);
-  book.setIndexPath(isRelativePath(path)
-                ? computeAbsolutePath(
-                      removeLastPathElement(writableLibraryPath, true, false),
-                      path)
-                : path);
-  book.setIndexType(type);
-  return true;
-} catch (...) {
-  return false;
-}
-
-bool Manager::setBookPath(const std::string& id, const std::string& path)
-try {
-  auto book = library->getBookById(id);
-  book.setPath(isRelativePath(path)
-     ? computeAbsolutePath(
-        removeLastPathElement(writableLibraryPath, true, false),
-        path)
-     : path);
-  return true;
-} catch(...) {
-  return false;
-}
-
 }