How many of you end up using an alternate text to study the material. Is this pretty common or uncommon? For instance, my Calc III book (Thomas) are like water and oil, but for some reason I understand the Steward Calc book (what I used for calc 1) so much better. My plan is to study the sections from the Stewart book and then do the problem sets from the Thomas book to be used to the types of problems the professor throws at us. Does this sound reasonable?