These two new titles in the Homework Helpers series will reinforce mathematical foundations and bolster students' confidence in geometry and pre-calculus. The concepts are explained in everyday language before the examples are worked. Good habits, such as checking your answers after every problem, are reinforced. There are practice problems throughout the books, and the answers to all of the practice problems are included. The problems are solved clearly and systematically, with step-by-step instructions provided. In both books, particular attention is placed on topics that students traditionally struggle with the most. While these books could be used to supplement standard geometry or pre-calculus textbooks, they could also be used by college students or adult learners to refresh long-forgotten concepts and skills.