Top critical review
Beware: number of downloads is limited
on 29 July 2015
As others have said, a somewhat idiosyncratic collection -- probably very old edition -- but usable. The main reason for the low star rating is it has a limit on the number of downloads you can do. I just tried to download to my new iPhone and got a "limit exceeded" message instead. Even though the old iPhone was de-registered. No info in Amazon's Help section either. Tedious.