Ok so I have a couple of models left in my small stash. And I'm looking for any helpful literature.. I've got Osprey modelling books for a couple of models but can't seem to find anything for the following

King Tiger II and M2a3 halftrack

I found the osprey books extremely helpful in building my previous models.. any help is as always extremely grateful....

According to Fred W. Crismon's US Military Tracked Vehicles the final development of the M2 halftrack was the M2A1.

There was a M3A2 standarized in 1944 designed to be adapatable to the rolls of both the M2 and M3 halftracks.

According to Wickipedia the M3A2 was not mass produced because it was decided that additional halftracks were not needed.

I believe that the old Tamiya kit is actually based on the M3A2 design.

Apologies, I actually have the Dragon M3A1 half track kit #6332, so was looking for any literature on this..

I've checked Osprey's website , but can't find any of the modelling based books.