This review book from Digital Actuarial Resources (DAR) covers the fundamental math featured on the actuarial exams, including calculus, trigonometry, and advanced algebra.  Some of the subtopics include double integrals, partial differentiation, Riemann sums, limits, and sequences.  The text teaches you numerous theorems, shortcuts, and problem-solving methods.  It also has hundreds of examples to illustrate the concepts.  The book is 246 pages and in softcover format.  You can download a demo of the book for free!