The Il-2 is one of the most crucial warplanes ever but unlike the Bf109, P51, B17 and Spitfire not more than one OSPREY volume has been dedicated to it. I recommend it to all:
https://www.amazon.de/Shturmovik-Gua...s%2C131&sr=8-1
It emphasizes rather its role as a workhorse as not much personal fame was achieved.
Cheers,
Michael