With the reboot of The Son Also Writes, I noticed that the keynote book for modern parents, written by Adam Mansbach, has also grown. It now encompasses three books.
Starting with the now modern classic Go The F**k to Sleep, Adam has written two sequels to it, with the soon-to-be classic You Have to F**king Eat, and now, just released a little over a year ago, F**k, Now There Are Two Of You.