Mark's last name is Jennings, it says it on the back cover of the book.

This is so great!! I love TWT,TIN!! Mark was my HERO!! I was so upset when he died *cries* Btw, his last name is Jennings =] Just to let ya know...But yea, this was great!!

yay! it's really good AND it makes sense with what goes in in the actual book! kudos to you!

this is good i love the book