Book 1
5 Very Good Reasons to Punch a Dolphin in the Mouth (And Other Useful Guides)
The Oatmeal
Book 2
How to Tell If Your Cat Is Plotting to Kill You
The Oatmeal
Book 3
My Dog: The Paradox
The Oatmeal
Book 4
Why Grizzly Bears Should Wear Underpants
The Oatmeal & Matthew Inman
Book 5
The Terrible and Wonderful Reasons Why I Run Long Distances
The Oatmeal