IŽve been thinking about making one for some twenty years now, but never made it beyond the early planning stage.
In mine, IŽd focus mostly on Starfleet, with a lot of starship drawings I make myself, and try to stay pretty close to what we get from TOS and the first movies, with only very few fictional designs.
But as Potemkin_Prod
said, there really isnŽt a market anymore for hardcopy manuals like that, when thereŽs so much stuff easily available on the internet. So youŽd be doing it just for yourself, basically. But of course that can be fun and worth the effort, too