This is one of the basic books that all of us use. Mostly about explosives but the fireworks chapter is great. Look in the AFN classified ads. Pyrotechnics , by G. W. Weingart. This is the first book most of us obtain and is still tops for beginners and medium level hobbyists.
Several variations are in print.
Look in the AFN classified ads and our catalog. A modern Japanese book translated into English. Has very detailed info, but is somewhat strange to use because the author doesn't call some fireworks effects by the same name that we use. Skylighter sells it. See his ad in AFN classifieds.