On a "flibook" edit page, enter a name for your flipbook, choose the size, choose if you want shadow around. Then click on the "Add Media" button. Add all images you want to create your flipbook. Once uploaded, click on "create a gallery" on the left panel. Click on "Create a new gallery". That's all! You can save your post and see the result.
On your flipbook edit page, you can change parameters as size or shadow. To modify images/pages, click on the "Edit Gallery" button, in the content. Here you can add images to your book. = I have the following error message : "Wrong parameter count for strstr()" It's because your PHP version is too old. Update it by editing your .htaccess file You need at least PHP 5.3.
Be careful to have only [gallery ids="xxx, xxx ,xxx"] in your post. Remove every other attributes like [gallery columns="y"] or [gallery links=""] Just the shortcode [gallery] with no ids won't work.