This thread over at the CartoonRetro forum has a great discussion about Christoper Hart's new book coming out which looks atrocious compared to the "Real retro artists". Like it's stated in the forum, "Why go to that book looking to draw retro, why not just go to the actual source"
Like subscribing to Cartoon Retro! Which I plan on doing soon. Sooooo much great stuff over there. Plus some of the stuff Shane is planning on adding seems like it will be pretty valuable.