Advice RE: Books from Stars

[JACKTEN]

Hi

I have 3180 FPP's on Stars and I want to get a book from Stars with them, but I dont know which books are good and which books arent, here is a link of the books that I can get:

http://www.pokerstars.com/fpp/store/books/

I mainly play 6/45man SNGs and 4/180s and 12/180s, with a few low level MTT's up to $15 a couple of times a week, which book do you think would be most helpful to me in the games I play?

Thanks