I cant delete comics I’ve read. I try to ever so gently touch the 3 dots but I always get sent to the last page of the book. They need to get on this.
The way to delete comics is to select the 3 BARS that bring up the general memory located on the left of the screen (to the left of DC Universe logo) when you are not in a comic. Select settings in that menu. From there select total space used under download. The screen that pops up will list all of your downloaded media with a garbage by each one. Select the garbage can to delete each comic or video.
Works great, easy as can be.
Should say general menu, not memory. Sorry.