Follow this link for
Jessica's Biscuit. When you search the catalogue, choose the Restaurant Management list within Professional books. The author of the books Marmalady mentioned is David Pavesic. There are 6 different books in the series. Each is $10.36, but you won't necessarily want to get all of them. Hope this helps!
BTW: in school we used
Management by Menu, by Kotschevar and Escoffier in our management classes. It could be a help to you. It's got info on recipe costing, menu pricing, menu analysis, and such. It's from The Education Foundation of the National Restaurant Association. Sorry, I don't know what it costs.