This textbook is a great resource for those interested in the subjects of Technology & Engineering, Science, Signals & Signal Processing, System Theory, and Telecommunications. The book is authored by Alan Willsky, S. Nawab, and Alan Oppenheim, and is a revised edition published in 1996 by Pearson Education. The book is a hardcover format and measures 9.5 inches in length, 7.7 inches in width, and 1.5 inches in height. It weighs 55.2 ounces and has 1000 pages. The book is in very good condition as pictured above.