diff --git a/src/contentmanager.cpp b/src/contentmanager.cpp
index 83370c9..9517957 100644
--- a/src/contentmanager.cpp
+++ b/src/contentmanager.cpp
@@ -77,10 +77,10 @@ ContentManager::ContentManager(Library* library, kiwix::Downloader* downloader,
     setLanguages();
 }
 
-QList<QMap<QString, QVariant>> ContentManager::getBooksList()
+ContentManager::BookInfoList ContentManager::getBooksList()
 {
     const auto bookIds = getBookIds();
-    QList<QMap<QString, QVariant>> bookList;
+    BookInfoList bookList;
     QStringList keys = {"title", "tags", "date", "id", "size", "description", "faviconUrl"};
     QIcon bookIcon;
     for (auto bookId : bookIds) {
@@ -216,9 +216,9 @@ void ContentManager::setLanguages()
 }
 
 #define ADD_V(KEY, METH) {if(key==KEY) values.insert(key, QString::fromStdString((b->METH())));}
-QMap<QString, QVariant> ContentManager::getBookInfos(QString id, const QStringList &keys)
+ContentManager::BookInfo ContentManager::getBookInfos(QString id, const QStringList &keys)
 {
-    QMap<QString, QVariant> values;
+    BookInfo values;
     const kiwix::Book* b = [=]()->const kiwix::Book* {
         try {
             return &mp_library->getBookById(id);
diff --git a/src/contentmanager.h b/src/contentmanager.h
index 84a75ba..f4d3b14 100644
--- a/src/contentmanager.h
+++ b/src/contentmanager.h
@@ -17,9 +17,13 @@ class ContentManager : public QObject
     Q_PROPERTY(QStringList downloadIds READ getDownloadIds NOTIFY downloadsChanged)
     Q_PROPERTY(bool isLocal MEMBER m_local READ isLocal WRITE setLocal NOTIFY localChanged)
 
-public:
+public: // types
     typedef QList<QPair<QString, QString>> LanguageList;
     typedef QList<QPair<QString, QString>> FilterList;
+    typedef ContentManagerModel::BookInfo     BookInfo;
+    typedef ContentManagerModel::BookInfoList BookInfoList;
+
+public: // functions
     explicit ContentManager(Library* library, kiwix::Downloader *downloader, QObject *parent = nullptr);
     virtual ~ContentManager() {}
 
@@ -51,7 +55,7 @@ private:
 
     QStringList getBookIds();
     void eraseBookFilesFromComputer(const QString dirPath, const QString filename, const bool moveToTrash);
-    QList<QMap<QString, QVariant>> getBooksList();
+    BookInfoList getBooksList();
     ContentManagerModel *managerModel;
     QMutex remoteLibraryLocker;
     void setCategories();
@@ -71,7 +75,7 @@ signals:
 
 public slots:
     QStringList getTranslations(const QStringList &keys);
-    QMap<QString, QVariant> getBookInfos(QString id, const QStringList &keys);
+    BookInfo getBookInfos(QString id, const QStringList &keys);
     void openBook(const QString& id);
     QMap<QString, QVariant> updateDownloadInfos(QString id, const QStringList& keys);
     QString downloadBook(const QString& id);
diff --git a/src/contentmanagermodel.cpp b/src/contentmanagermodel.cpp
index db15d72..af0ffd0 100644
--- a/src/contentmanagermodel.cpp
+++ b/src/contentmanagermodel.cpp
@@ -102,7 +102,7 @@ QVariant ContentManagerModel::headerData(int section, Qt::Orientation orientatio
     }
 }
 
-void ContentManagerModel::setBooksData(const QList<QMap<QString, QVariant>>& data)
+void ContentManagerModel::setBooksData(const BookInfoList& data)
 {
     m_data = data;
     rootNode = std::shared_ptr<RowNode>(new RowNode({tr("Icon"), tr("Name"), tr("Date"), tr("Size"), tr("Content Type"), tr("Download")}, "", std::weak_ptr<RowNode>()));
@@ -124,7 +124,7 @@ QString convertToUnits(QString size)
     return preciseBytes + " " + units[unitIndex];
 }
 
-std::shared_ptr<RowNode> ContentManagerModel::createNode(QMap<QString, QVariant> bookItem, QMap<QString, QByteArray> iconMap) const
+std::shared_ptr<RowNode> ContentManagerModel::createNode(BookInfo bookItem, QMap<QString, QByteArray> iconMap) const
 {
     auto faviconUrl = "https://" + bookItem["faviconUrl"].toString();
     QString id = bookItem["id"].toString();
diff --git a/src/contentmanagermodel.h b/src/contentmanagermodel.h
index 92f2da2..55404bb 100644
--- a/src/contentmanagermodel.h
+++ b/src/contentmanagermodel.h
@@ -16,7 +16,11 @@ class ContentManagerModel : public QAbstractItemModel
 {
     Q_OBJECT
 
-public:
+public: // types
+    typedef QMap<QString, QVariant> BookInfo;
+    typedef QList<BookInfo>         BookInfoList;
+
+public: // functions
     explicit ContentManagerModel(QObject *parent = nullptr);
     ~ContentManagerModel();
 
@@ -29,13 +33,13 @@ public:
     QModelIndex parent(const QModelIndex &index) const override;
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
-    void setBooksData(const QList<QMap<QString, QVariant>>& data);
+    void setBooksData(const BookInfoList& data);
     void setupNodes();
     bool hasChildren(const QModelIndex &parent) const override;
     void sort(int column, Qt::SortOrder order = Qt::AscendingOrder) override;
     void refreshIcons();
 
-    std::shared_ptr<RowNode> createNode(QMap<QString, QVariant> bookItem, QMap<QString, QByteArray> iconMap) const;
+    std::shared_ptr<RowNode> createNode(BookInfo bookItem, QMap<QString, QByteArray> iconMap) const;
 
 public slots:
     void updateImage(QModelIndex index, QString url, QByteArray imageData);
@@ -44,12 +48,12 @@ public slots:
     void resumeDownload(QModelIndex index);
     void cancelDownload(QModelIndex index);
 
-protected:
+protected: // functions
     bool canFetchMore(const QModelIndex &parent) const override;
     void fetchMore(const QModelIndex &parent) override;
 
-private:
-    QList<QMap<QString, QVariant>> m_data;
+private: // data
+    BookInfoList m_data;
     std::shared_ptr<RowNode> rootNode;
     int zimCount = 0;
     ThumbnailDownloader td;
diff --git a/src/rownode.h b/src/rownode.h
index d1edbaa..b8f97f9 100644
--- a/src/rownode.h
+++ b/src/rownode.h
@@ -3,7 +3,6 @@
 
 #include "node.h"
 #include <QList>
-#include "contentmanagermodel.h"
 #include <QIcon>
 #include "kiwix/book.h"