04-15-2008, 08:02 PM
Tarn's "The Greeks In Bactria & India" deals with the political history of the region fairly well, but the scholarship has begun to show its age. The newest edition, however, contains a greatly expanded and updated bibliography by Frank Holt and M.C.J Miller that may be of some use to you.
Joseph Pietrykowski
Ubi solitudinem faciunt, pacem appellant
Ubi solitudinem faciunt, pacem appellant