The Ninety Trillion Fausts is a vintage paperback novel, part of The Quantara Marathon book series by Jack L. Chalker. It was published in 1991 by Ace Books and illustrated by Darrell K. Sweet. The book is an adventure, fantasy, and science fiction novel intended for young adults and adults. It has 360 pages and is 5 inches long, 7 inches tall, and 0.5 inches wide. The book is written in English and has special attributes as a vintage paperback.