Hey, I use the Google Play Books app on my Nexus 7 for e-reading books. I loved the offline dictionary that would define a word in a slide up mini-window after selecting the word, like shown in the following screenshot: https://lh3.ggpht.com/iwvRAu2LWHbT0olRjiGwkJe7Gw8iwEPEbvFbgtLgcGp8eKTKXPFEXkkyfw6zerUy7p8=h900-rw . I just wiped my Nexus 7 to install a new ROM and reinstalled the Play Books application. However, now when I select a word the definition doesn't pop up. I don't know if it is something that I am doing wrong or if its a problem with the latest version of the application. For those that use Play Books, can you check if the offline dictionary is working for you on your device? On another note, what application do you use for e-reading on Android. And do they have features like changing backgrounds, fonts, offline dictionaries, etc.