Handy compilation of 100 practice problems, hints, and solutions indispensable for students preparing for the William Lowell Putnam and other mathematical competitions. Problems suggested by a variety of Crux Mathematicorum, Mathematics Magazine, The American Mathematical Monthly and others. Preface to the First Edition. Sources. 1988 edition.
Kenneth Williams and Kenneth Hardy split "The Red Book of Mathematical Problems" into three sections. The first section introduces the problems, the middle portion contains hints to solve the problems, and the final section contains the complete solution to each problem.
The final section is much longer because it goes in-depth into each problem.
The book is sufficient for its purpose. I don't have any issues with it.