This is a new version of OdtXslt that adds another transform to put the back link on a book name before the chapter number and at the top of each book it adds a link back to the table of contents. The text of the link back to the table of contents can be changed by changing the defined parameter in the .bat file.
When there are long books, the epub export breaks them into multiple files inside the epub. In order to get the book names right for the chapters in the second and subsequent files, it is necessary to put these book names in a defined parameter inside the batch file too. You can look into the batch file to see how this is done but if the book name contains a space, you will want to replace it with an underscore.
You can get this latest version of the program (which includes the previous transforms here.