My community college is requiring us to use Stewart's Calculus 7th editon (california custome ED.). I emailed the professor asking if we could use the normal US version and he said it is fine. While trying to be a cheapass I found out that the California Ed of Stewart Calculus is cheaper then the normal &th ed. The problem is that the California Custom edition has 200 or maybe 300 less pages(not sure if error by seller). What are the major changes between both books? Has the California edition been stripped of content? Thanks. Also, can anyone recommended a good introduction to statistics book for me?