Day 7 - 30 Day Book Meme

 Least favorite plot device employed by way too many books you actually enjoyed otherwise.

Not sure this counts as a 'plot device' but my pet peeve is to make otherwise smart and cool characters suddenly so stupid that someone has to explain to them the most basic stuff that they already know, as a means of data dumping to their readers. ARgh...

The old, "Explain that to me one more time?" trick