Any book recommendations?

Hi I'm a newbie here. I've bought quite a few 2+2n publications and was considering purchasing another couple. I was just wondering what people generally thought of these two books for a low limit $1+.20 tournament player.

The first is book 2 by Harrington The Endgame. I've got book one and am very happy with it, i'm just wondering is book two just as good?

The second book is Tournament poker for advanced players by Sklansky I've no idea about this book at all. Any peoples veiws on this? Is it a must read for an serious tournament enthusiast?

Thanks for your time to feedback

All the best

Koy