For any of you ppl that have majored in physics and/or math and are bored with the usual stuff, check out [ame="http://www.amazon.com/Variational-Principles-Mechanics-Physics-Chemistry/dp/0486650677"][/ame] This is a great book! It's not a textbook - just a work of art when it comes to clarity and beauty. Leads one through Lagrangian and Hamiltonian Mechanics. It's not as thorough as [ame="http://www.amazon.com/s/ref=nb_sb_ss_i_0_29?url=search-alias%3Dstripbooks&field-keywords=goldstein+classical+mechanics&sprefix=goldstein+classical+mechanics"]Goldstein[/ame] but much more powerful at explanation. Probably the best exposition of physics I've ever read. [Warning: Requires some acquaintance with PDEs - and a little Calculus of Variations wouldn't hurt. Standard Newtonian Mechanics is about the only Physics prereq., though a Math major with only a smattering of undergrad physics could handle it.]