I have the book on the Spit and the Mustang. I regard them as nice books to browse but I didn't find anything that would bring my model to a next level. I will not be buying the Tiffie-book from ADH, unless it's in the 5 GBP-box of a book seller... Just my personal opinion, of course!
If you see what build time the builder(s) had from getting the preproduction kits to the publishing date, it's easy to see that they can't possibly do a detailing job like some world renowned modellers do that spend 1-2 years building a Tamiya Tomcat or F-15E... It might whet your appetite to see how Brett Green et al. build paint and weather the basic kit. I'm sure it's very pretty to look at. Only, if I look at your standards of building and finishing models, Dave, I don't think you'll learn anything new...