Choose my next book for me

[splashpot]

What should I ask for Christmas? My main game is SNGs and my primary reading material is always the single table tourny forum, but I'm gonna get a book no matter what.

My current collection -

SSH
HPFAP
TOP
HOH 1&2
Inside the Poker Mind
TPFAP
GSIH
Caros Book of Tells
Super System

Possible -
Gambling Theory and Other Topics
Pot limit and No limit Poker
Improve your Poker
Some non-strategy book (suggestions)
Other