This is the third edition of Competitive Programming book.
This is the A5 paperback version. This is the intended version for typical audience, i.e. young programmers of age 15-25. If you need a larger 8.25 * 10.75 inch version (about the size of A4, or 2 x A5), please go to: http://www.lulu.com/shop/steven-halim/competitive-programming-3-hardcover/hardcover/product-21031840.html
A much more detailed information about this book is available at: https://cpbook.net