An e-book that was not due will not play now.
Thanks for letting us know about the problems you're having. Unfortunately, without knowing exactly which format your eBook titles are in or what device you're reading them on, it's hard to know where to direct your concern.
You may have to delete the files from your system and check them out again. They will let you know how to proceed.
If you're having problems with another format, please check the links from our eBook page.
Hopefully they will help you solve your problem.