Version 4.11, which is rolling out through the ay Store, brings in a feature called rd se, which pops up hints above words that Kindle thinks may be challenging. The goal is to give you confidence to read more difficult books, so you may finally tackle r ace or other oppressive tomes. The popular highlights feature is also here now, alerting you to phrases selections that other Kindle users have highlighted while reading. Of course this update comes with the usual round of bug fixes performance improvements, too.