As far as Vigorito's books are concerned i'd like to say this: i don't know what to think of them! These books have many things that make me happy. I read them in pleasure just to stop at a particular point and say: "No,no this is wrong....". With a bit care at the details they'd fantastic really. I was very critical with the first volume at the QC blog (even Vigorito paricipated in the discussion with some harsh comments), later i changed my mind and later i was sceptical again! I haven't met a book that caused me this state of mind for so long. Probably the same happens with the KID in general, so that is probably the reason! Anyway, yes great books but not excellent.
Sakaev on Petroff: magnificent work! Wow! And the "extras" (Danish, King's Gambit, 4 Knighs game etc) fantastic additions that made me 100% happy. The only problem with such a book is the opening itself. Who wants to play it for Black? Memorise tons of lines on various dangerous systems just to make a draw? Simply this doesn't work on amateur level. I got he book though in order to find what to play with White, and in that respect this books served me well. I love it, it is really great.
RL move by move: great but many of his suggestions are...how to say it...second rated. He missed important details in the Yurtaev system and his proposal was promoted from him as best, he leaves out e=several other systems, his d3 repertoire was not as complete as he says...and so on. Yes, i love it too because McDonald is fantastic writer so i can recommend it.
Nimzo move by move: I am probably one of the few that disagree with the large majority of the recommendations? I cannot say that i am "the only one" because i know a solid GM (who is for sure a bigger expert that Emms in the Nimzo) that agrees with me!
Scotch by Dembo and Palliser on the other hand is a great book, so this should be nominated. Vigorito's Dragon book is also great but probably it got out on 2012, didn't it? And it lucks (again!) some depth in critical areas (not the same happens in Palliser's excellent Benoni work!).
These are some of my thoughts for now. More when the voting starts!
I like Vigorito's in depth and principled approaches to the classical, fianchetto, four pawns, and h3 but I think the Panno against the Saemisch is one of the worst lines strong grandmasters regularly play.