"On Guard: Defending Your Faith with Reason and Precision" is a non-fiction book by William Lane Craig that addresses the defense of faith. Published in 2010, the book offers a well-founded analysis and argumentation for the Christian belief system. Craig, a renowned philosopher and theologian, uses clear and precise language to make complex topics understandable. With a length of 286 pages and a handy paperback format, it is suitable for both students and interested readers who wish to engage with apologetic questions. The book is written in English and weighs 468 grams, making it a practical companion for on-the-go reading. Its dimensions of 22.8 cm in height and 17.7 cm in width ensure that it easily fits into a bag. "On Guard" is a valuable resource for anyone looking to support their faith with rational arguments.