Thanks to my lovely wife Lady Avelyn, I have a new addition to my leatherworking library. One of the key books from a research perspective that I was missing was "Knives and Scabbards (Medieval Finds from Excavations in London)". Missing no more, since as an early birthday present it has now been added to the collection.
I haven't had a chance to look through it yet, but I'm sure there's going to be lots of interesting information.
From a recreating the objects point of view, I don't think you can beat the Goubitz books ("Purses in Pieces" and "Stepping Through Time") just because of the quality of his illustrations and the fact that he often shows you the shapes for the actual leather patterns to make the object, but these Museum of London books (I also have "Shoes and Pattens") seem to have a lot of historical research in them that could be useful.
The title has been added to my LibraryThing list in the right-hand column of the blog if you'd like to see what else is on my leatherworking bookshelf.