The Skennertonicon book is only $10:

http://www.skennerton.com/sais.html

Or are you talking about 'The Sten Machine Carbine' by Peter Laidlericon?

Collector Grade Publications - Bookshelf #6 - Prewar Colt National Match Government Model Pistol, M1 Garand rifle, Sten Machine Carbine

"A man can never have too much red wine, too many books, or too much ammunition"
Rudyard Kipling