This tool is presently in beta. We appreciate your patience as we add features. — The Scalar Team
Book
Book properties: No attributes of the source are transfered to the destination.
Pages
The following Style attributes aren't presently transfered: Custom CSS style, Custom Javascript.
The following Metadata attributes aren't presently transfered: Page visibility, Content type.
Thumbnails & Background image & Background audio: These fields can link to media uploaded directly to a source book, which can cause problems should the source book be deleted (more below in Media section).
Media
Imported media: Any media imported to a source book via an outside archive (ie, the media has an external URL) will be properly transfered.
Uploaded media: Media uploaded directly to a source book will not be physically transfered to a destination book. Rather, the destination media pages will point to the URL of the media housed in the source book. This means that in the event that the source book is deleted, the media link will go dead. However, this problem can be corrected using the "Replace existing" feature at Import > Local media files.