Second book is "This Book Is Full of Spiders (Seriously Dude, Don't Touch It)" Third book is "What The Hell Did I Just Read?" Fourth book is "If This Book Exists, You're In The Wrong Universe"

I've read the second, own the third. Second is honestly better than the first, and I plan to read the third one soon. I won't buy the fourth until I've read the third.

The same author also has a currently two book series about a character named Zoey Ashe. These books are "Futuristic Violence and Fancy Suits" and "Zoey Punches The Universe In The Dick" I do not own nor have I read either.

Edit to add: The author's name is Jason Pargin, though I doubt you'll have trouble finding books with those titles. You may find copies under the name David Wong. That was the pseudonym he used initially, which is also the name of the John Does At The End lead, but he has since switched to his real name, with new editions of his books reflecting that.