Basementboy, Madgeteerr has covered some Middle East general books but I would point out that the Yadin and Herzog books are now a tad dated, but still useful especially for Israelite topics. The Ospreys can be a bit hit or miss. The very general ones are too thin, so select carefully.
I'll concentrate on Alexander's immediate Successors and the Parthians. I think most of what I list are still in print and available.
Two volumes by Bob Bennet and Mike Roberts entitles "The Wars of Alexander's Successors" . Vol 1 covers "Commanders and Campaigns", Vol 2 "Battles and Tactics". Page count for the two together 400 pages.
"The Perdiccas Years" by Tristan Hughes. Covers 323-320BC
"Dividing the Spoils" by Robin Waterfield. Covers to circa 280BC
"Ghosts Around the Throne" by James Romm. Covers to the death of Cleopatra, Alexander's sister.
There are many more books on specific armies such as the Ptolemaic and Seleucids, plus a trilogy on the Seleucid Empire if you are interested.
I don't have many books on the Parthians specifically. I would avoid the Osprey Men-at-Arms book as it is thin and now quite old. However they are covered in the following;
"Shadows in the Desert; Ancient Persia at War" by Dr Kaveh Farrokh. This book covers the Achaemenids, Parthians and Sassanids"
"The Defeat of Rome" by Gareth Sampson. Covers Crassus' Carrhae campaign of 53BC
There is also a wargamer's guide to the Parthians by Jim Webster. Published for the Impetus ruleset it is a fairly useful introduction to the Parthian army. It is available as a download from Wargames Vault for less than $5.
If there are any more specifics you are interested in happy to dig deeper in my library.