I cannot recommend a sim racing specific book.
I would look for racecar driving books to really know how to approach corners and combos thereof, braking, shifting, etc. Bob Bondurant On High Performance Driving; Carrol Smith Drive to Win; and Henry A WattsSecrets of Solo Driving are on my bookshelf (not that I have ever studied them!)
Somewhere I have some photocopies of a 1950s book written by none other than Juan Manual Fangio with excellent diagrams and othe tips which are fundamental to smooth, fast driving.