Galen Govier's Code Book - is it worth getting?

I use mine all the time, especially when I'm out junk yardin'!! A quick run through the parts interchange book when looking through piles of bellhousings, intake and exhaust manifolds and the like has yielded me more scores than the books ever cost. Not to mention on-the-spot confirmation capabilities and all those little hidden notes that explain things about other models I'm not that familiar with!! Bought a lot of good cars and parts running numbers through those books!! Worth every penny IMO!! Geof