First was Osprey Elite #124: World War II Infantry Anti-Tank Tactics, which gave a solid hint as the progression of means for infantry to deal with tanks during that conflict. A reasonably good read.
The second was Osprey New Vanguard #15: Flammpanzer: German Flamethrowers 1941 -1945, a book dealing with certain tanks especially armed with flamethrowers. Not as interesting a read as the prior book above.