The 11th Hour Series of revision guides are designed for quick reference. The organization of these books actively involves students in the learning process and reinforces concepts. At the end of each chapter there is a test including multiple choice questions, true/false questions and short answer questions, and every answer involves an explanation. In adddition, each book contains icons in the text indicating additional support on a dedicated web page. Students having difficulties with their courses will find this an excellent way to improve their grades.