I bought his book. Not worth the money, in my opinion. No plans, just an expensive recap of his old web site. If you just want guidelines, it may be worth the money. If you're looking for dimensional plans, save your money.
I recently purchased Barry Young's books on "8X10 Field Camera Plans" and "Modern Bellowsmaking." Excellent books and tremendous support by the author.
Barry is a member here. Start a conversation with him to get the particulars.