Because if it works once*, it'll work thirteen more times.

From PW:

HarperCollins Children’s Books has acquired world rights to 13 children’s books featuring the Labrador John Grogan wrote about in his bestselling memoir, Marley & Me.

I'm sorry, but gag me.

And also, BO-RING.

_______________________________________________________________

*My mistake.  Apparently, there are already two Marley picture books in addition to the middle grade adaptation of the adult memoir.