This is definitely a must-have! Roy Bacon is one of the few authors who take their subject seriously, and who research thoroughly before they write. I have great respect for all publications by Roy Bacon, but his works "Norton Twins" and, equally, "Norton Singles", stand out from the rest.

Norton Twins is now, after years of being out of print, available again from our "Technical Publications" Department (Part# RB002, £22.50). If you are interested in Norton Twin cylinder models (including lighweights), contemplate buying one, want an idea what was produced, what is what, what year had what specification etc, get hold of one. This, for me, is the best book on the Norton twins.

Apart from giving an overview, chapter by chapter, about the development of the Norton twins, with many a period picture and well-researched, accurate information, it also gives details on specials like Wankel, Wulf and Cosworth.

Worth its weight in gold (or more) is the "Specifications" appendix, which makes this probably the most-used Norton book in my library. Many times a question could be answered very quickly by looking up specifications and carburettor settings in this book, rather than by taking out all workshop manuals for all years and, leafing through them, finding the information in different places all over the manual.

If Norton Twins are the game, Roy Bacon is the name!