the Knife markets of Sanaa
 

Does anyone have this book, and can they tell me if it's worth buying. Not a lot of information online and I don't want to pay good money based just on the cover, Thanks in advance.

I am not aware of this publication, though I note that it is listed as being 24 pages in length (not that brevity is necessarily bad.)

You may wish also to investigate Stephen Gracie's Jambiya: Daggers from the Ancient Souqs of Yemen. I note that this book is now expanded in its second edition in paperback, but I know it only from its hardback first edition.