"How to Solve It" by G Polya is a textbook published in 1990 that focuses on mathematics. The book offers strategies and techniques for solving mathematical problems effectively. With a publication date of 1990-04-26, this textbook is a valuable resource for adult learners and university students looking to enhance their problem-solving skills in mathematics. Polya's insightful guidance and examples make this book a useful tool for those seeking to improve their mathematical abilities.