A sizeable database performance boost is available in the latest release of open source ebook manager, view and converter Calibre, plus plenty of bug fixes.

The miniature, Android-based ebook reader is $30 less for a limited time.

There are no shortages of discounts and deals in the latest Prime Day sale — the Black Friday-like bargain-a-thon reserved for those with an Amazon Prime membership. But there are very few price cuts ...