The first volume on the rook rifles is very impressive and the second volume will make it to over 800 pages of photos and information. All seven of Wal's books to date set a very high bar for books to come. Wall has put a lot of effort into getting all of the information he can. I do hope he will be able to finish Volume 9 which will be some of the odd British actions like the "Money-Walker" and many others made in very limited quantities.
I have am helping proof the second volume and with luck it will be available this fall.
Cheers,
Laurie