This 198-page full-color book includes the entire fourth year of strips (four full storylines) from October 2013 through September 2014! There's commentary! There's cast bios! There's bonus features! You can also pay extra to get it doodled in and autographed, because this is America.
Dumbing of Age Book 4 is now available on ComiXology, in case you wanna read it along with all of your other digital comics!