The Skulski book is excellent, and the Gakken books on the Yamato are quite good as well.
There's a couple of websites that can be of help, www.modelwarships.com has a couple of models in various scales built by some well-known ship modelers that will be happy to assist you. www.j-aircraft.com has a forum dedicated to IJN warships that's also top notch.
If you're looking for a copy of the instructions, let me know, I'm in the middle of planking the deck of my 1/200 Yamato as we speak. I'd also recommend getting the Gold Medal Models brass set for it. It's a must have.
Jeff Herne
Modelwarships.com