We also publish books that may be of interest to Latter-day Saints (due to subject matter or time period).
Currently these include:
Ancient Monuments of the Mississippi Valley (1828, by Squire and Davis)
Laws of the State of Illinois (1841, which includes the Nauvoo Charter, the Nauvoo House Incorporation, the Nauvoo Charter Repeal in 1845, and the Illinois state apology to the Church)
The LDS Biographical Encyclopedia (in a value-priced four volume paperback set)
A Correct Account of the Murder of Generals Joseph Smith and Hyrum Smith at Carthage