Ebook: Elementary Calculus: An Infinitesimal Approach

I was searching the net looking for calculus resources and I ran across the author's website. The copyright belongs to him and he has posted the entire book (992 pages) online and offers it as a free download for those who are interested. Hop over to any search engine, type in Keisler Calculus and I am pretty sure that at the top of list will be his book.

As for the book - a standard textbook that is rather well written and takes some creative approaches to limits and as a result derivatives. There are PLENTY of practice problems which is great for the teacher but I am not aware of a solutions manual which is sort of a downer for the casual student.