diff --git a/YACReaderLibrary/initial_comic_info_extractor.cpp b/YACReaderLibrary/initial_comic_info_extractor.cpp
new file mode 100644
index 00000000..d275f8a6
--- /dev/null
+++ b/YACReaderLibrary/initial_comic_info_extractor.cpp
@@ -0,0 +1,174 @@
+#include "initial_comic_info_extractor.h"
+
+#include <QsLog.h>
+#include "pdf_comic.h"
+#include "comic.h"
+#include "compressed_archive.h"
+#include "qnaturalsorting.h"
+
+using namespace YACReader;
+
+bool InitialComicInfoExtractor::crash = false;
+
+InitialComicInfoExtractor::InitialComicInfoExtractor(QString fileSource, QString target, int coverPage)
+    : _fileSource(fileSource), _target(target), _numPages(0), _coverPage(coverPage), _xmlInfoData()
+{
+}
+
+void InitialComicInfoExtractor::extract()
+{
+    QFileInfo fi(_fileSource);
+    if (!fi.exists()) //TODO: error file not found.
+    {
+        _cover.load(":/images/notCover.png");
+        QLOG_WARN() << "Extracting cover: file not found " << _fileSource;
+        return;
+    }
+#ifndef NO_PDF
+    if (fi.suffix().compare("pdf", Qt::CaseInsensitive) == 0) {
+#if defined Q_OS_MAC && defined USE_PDFKIT
+        MacOSXPDFComic *pdfComic = new MacOSXPDFComic();
+        if (!pdfComic->openComic(_fileSource)) {
+            delete pdfComic;
+            //QImage p;
+            //p.load(":/images/notCover.png");
+            //p.save(_target);
+            return;
+        }
+#elif defined USE_PDFIUM
+        auto pdfComic = new PdfiumComic();
+        if (!pdfComic->openComic(_fileSource)) {
+            delete pdfComic;
+            return;
+        }
+#else
+        Poppler::Document *pdfComic = Poppler::Document::load(_fileSource);
+#endif
+
+        if (!pdfComic) {
+            QLOG_WARN() << "Extracting cover: unable to open PDF file " << _fileSource;
+            //delete pdfComic; //TODO check if the delete is needed
+            pdfComic = 0;
+            //QImage p;
+            //p.load(":/images/notCover.png");
+            //p.save(_target);
+            return;
+        }
+#if !defined USE_PDFKIT && !defined USE_PDFIUM
+        //poppler only, not mac
+        if (pdfComic->isLocked()) {
+            QLOG_WARN() << "Extracting cover: unable to open PDF file " << _fileSource;
+            delete pdfComic;
+            return;
+        }
+#endif
+        _numPages = pdfComic->numPages();
+        if (_numPages >= _coverPage) {
+#if defined Q_OS_MAC || defined USE_PDFIUM
+            QImage p = pdfComic->getPage(_coverPage - 1); //TODO check if the page is valid
+#else
+            QImage p = pdfComic->page(_coverPage - 1)->renderToImage(72, 72);
+#endif //
+            _cover = p;
+            _coverSize = QPair<int, int>(p.width(), p.height());
+            if (_target != "") {
+                QImage scaled;
+                if (p.width() > p.height()) //landscape??
+                {
+                    scaled = p.scaledToWidth(640, Qt::SmoothTransformation);
+                } else {
+                    scaled = p.scaledToWidth(480, Qt::SmoothTransformation);
+                }
+                scaled.save(_target, 0, 75);
+            } else if (_target != "") {
+                QLOG_WARN() << "Extracting cover: requested cover index greater than numPages " << _fileSource;
+                //QImage p;
+                //p.load(":/images/notCover.png");
+                //p.save(_target);
+            }
+            delete pdfComic;
+        }
+        return;
+    }
+#endif //NO_PDF
+
+    if (crash) {
+        return;
+    }
+
+    CompressedArchive archive(_fileSource);
+    if (!archive.toolsLoaded()) {
+        QLOG_WARN() << "Extracting cover: 7z lib not loaded";
+        crash = true;
+        return;
+    }
+    if (!archive.isValid()) {
+        QLOG_WARN() << "Extracting cover: file format not supported " << _fileSource;
+    }
+
+    QList<QString> order = archive.getFileNames();
+
+    //Try to find embeded XML info (ComicRack or ComicTagger)
+
+    auto infoIndex = 0;
+    for (auto &fileName : order) {
+        if (fileName.endsWith(".xml", Qt::CaseInsensitive)) {
+            _xmlInfoData = archive.getRawDataAtIndex(infoIndex);
+            break;
+        }
+
+        infoIndex++;
+    }
+
+    //--------------------------
+
+    if (_target == "None") {
+        return;
+    }
+
+    //se filtran para obtener sólo los formatos soportados
+    QList<QString> fileNames = FileComic::filter(order);
+    _numPages = fileNames.size();
+    if (_numPages == 0) {
+        QLOG_WARN() << "Extracting cover: empty comic " << _fileSource;
+        _cover.load(":/images/notCover.png");
+        if (_target != "") {
+            _cover.save(_target);
+        }
+    } else {
+        if (_coverPage > _numPages) {
+            _coverPage = 1;
+        }
+        std::sort(fileNames.begin(), fileNames.end(), naturalSortLessThanCI);
+        int index = order.indexOf(fileNames.at(_coverPage - 1));
+
+        if (_target == "") {
+            if (!_cover.loadFromData(archive.getRawDataAtIndex(index))) {
+                QLOG_WARN() << "Extracting cover: unable to load image from extracted cover " << _fileSource;
+                _cover.load(":/images/notCover.png");
+            }
+        } else {
+            QImage p;
+            if (p.loadFromData(archive.getRawDataAtIndex(index))) {
+                _coverSize = QPair<int, int>(p.width(), p.height());
+                QImage scaled;
+                if (p.width() > p.height()) //landscape??
+                {
+                    scaled = p.scaledToWidth(640, Qt::SmoothTransformation);
+                } else {
+                    scaled = p.scaledToWidth(480, Qt::SmoothTransformation);
+                }
+                scaled.save(_target, 0, 75);
+            } else {
+                QLOG_WARN() << "Extracting cover: unable to load image from extracted cover " << _fileSource;
+                //p.load(":/images/notCover.png");
+                //p.save(_target);
+            }
+        }
+    }
+}
+
+QByteArray InitialComicInfoExtractor::getXMLInfoRawData()
+{
+    return _xmlInfoData;
+}
diff --git a/YACReaderLibrary/initial_comic_info_extractor.h b/YACReaderLibrary/initial_comic_info_extractor.h
new file mode 100644
index 00000000..34879da3
--- /dev/null
+++ b/YACReaderLibrary/initial_comic_info_extractor.h
@@ -0,0 +1,36 @@
+#ifndef INITIALCOMICINFOEXTRACTOR_H
+#define INITIALCOMICINFOEXTRACTOR_H
+
+#include <QtGui>
+
+namespace YACReader {
+class InitialComicInfoExtractor : public QObject
+{
+    Q_OBJECT
+
+public:
+    InitialComicInfoExtractor(QString fileSource, QString target = "", int coverPage = 1);
+
+private:
+    QString _fileSource;
+    QString _target;
+    QString _currentName;
+    int _numPages;
+    QPair<int, int> _coverSize;
+    QImage _cover;
+    int _coverPage;
+    static bool crash;
+    QByteArray _xmlInfoData;
+
+public slots:
+    void extract();
+    int getNumPages() { return _numPages; }
+    QPixmap getCover() { return QPixmap::fromImage(_cover); }
+    QPair<int, int> getOriginalCoverSize() { return _coverSize; }
+    QByteArray getXMLInfoRawData();
+signals:
+    void openingError(QProcess::ProcessError error);
+};
+}
+
+#endif // INITIALCOMICINFOEXTRACTOR_H
diff --git a/YACReaderLibrary/library_creator.h b/YACReaderLibrary/library_creator.h
index ccb27f24..d2d7a435 100644
--- a/YACReaderLibrary/library_creator.h
+++ b/YACReaderLibrary/library_creator.h
@@ -67,30 +67,4 @@ signals:
     void updatedCurrentFolder(QModelIndex);
 };
 
-class ThumbnailCreator : public QObject
-{
-    Q_OBJECT
-
-public:
-    ThumbnailCreator(QString fileSource, QString target = "", int coverPage = 1);
-
-private:
-    QString _fileSource;
-    QString _target;
-    QString _currentName;
-    int _numPages;
-    QPair<int, int> _coverSize;
-    QImage _cover;
-    int _coverPage;
-    static bool crash;
-
-public slots:
-    void create();
-    int getNumPages() { return _numPages; }
-    QPixmap getCover() { return QPixmap::fromImage(_cover); }
-    QPair<int, int> getOriginalCoverSize() { return _coverSize; }
-signals:
-    void openingError(QProcess::ProcessError error);
-};
-
 #endif