I'm sure everyone doing some level of calculus or physics here is familiar with the Thomas Calculus Textbooks Series. Anyways, I've been really confused when searching for these textbooks, because there are so many different versions. Can anyone list and explain each version of the 12th edition Thomas Calculus textbook that they are familiar with. I think there's (Normal Version, Early Transcendentals, Single Variable, Multi-variable, and combinations of the previous one's with or without 1st or 2nd order differential equations). I may be missing some, but can someone please clarify the differences between each as well as list the specific books. Thanks.