I dont think there is a book specifically on this maker. Lancaster (aka Henry Thorne) did write books though.

This maker is fastly becoming my favorite, the more I read about Thorn, how he ran the busniness and how he didn't take any b.s. from other makers or people involved in the trade, the more I like the guns. The boxlocks (or body action as Thorn called them) are wonderfully shaped and very finely finished inside and out. The Model A, the companies flag ship model is my favorite English gun. I've had my gun completely apart.. and there are so many fine details involved in its manufacture, things that took alot of extra time, things that alot of other guns, guns costing much more didn't have. Examples would be the way the tumblers are polished and filed, the high quality of the springs, the polish and fitting of all the other lock parts, the inletting in the stock, the house style engraving, all of it is just superb.
Dustin