It certainly looks incredible, but for $153 it seems way to expensive. The signed certificate is cool and they are probably filled with lots of interesting facts, but ultimately you would be paying a lot of money for guides to games most Zelda fans have probably already beaten.
If you don't need the guides, then I would definitely recommend The Legend of Zelda: Hyrule Historia which can be bought for just $20. A steal at that price, it's just a book packed with interesting facts that experienced Zelda fans will definitely appreciate.
It is tempting though. I just wish it was a lot cheaper.