Reddit mentions of The Road to Oxiana

You might like My Khyber Marriage and Valley of the Giant Buddahs. They are autobiographical reports by a Scotswoman who married a Pashtun and moved to Afghanistan in the 1920s. My Life: From Brigand to King--Autobiography of Amir Habibullah may also be of interest. It is an as-told-to autobiography of an Afghan brigand who briefly overthrew the King about ten years after the first two books were written. The Road to Oxiana is a bit clunky but offers a Western perspective on Afghanistan in the 1930s.

The more general Afghanistan of the Afghans, written by the husband of the woman mentioned above, focuses a lot of culture and cultural history, Afghanistan is a more general history and this Afghanistan claims to be more about the military history but I haven't read it myself to judge.

If you want something more contemporary, The Places In Between is a decent travelogue by an adventurer/preservationist/mercenary who walked through parts of the country. It didn't blow me away but it is interesting and most contemporary Afghan books from the West are such trash that this one shines in comparison. The author really did go to areas of Afghanistan about which most people know very little.

Ghost Wars is a popular book that focuses on the US involvement in the area during the Soviet Afghan war. Taliban is another popular book, and focuses on the Taliban in the 1990s and early 2000s. The link is to the second edition which I believe is updated.