I have read them all, each before my first trip to Scotland, Ireland, and England. I learned a great deal about the best way to route my trip, of courses that weren't in the rota, and about fun little tidbits he a posted about a destination. Having not played there until after my first read, I couldn't argue with his critiques. After I played each course, I reread his comments, and while I didn't agree with all of his perspectives, I found the reviews still interesting and informative. His style was so personal and not as stuffy as many golf books that describe each hole in agonizing detail (I find those hard to read). All in all, three must reads for anyone interested in GB&I.
Greg