Mechanical Monarch / Twice Upon a Time

By Charles L. Fontenay and E.C. Tubb

This Ace Double contains both Mechanical Monarch and Twice Upon a Time. It should not be combined with either individual work. This description may be from another edition of this product.

• Format: Mass Market Paperback
• ISBN: 044104266X
• ISBN13: 9780441042661
• Release Date: January 1958
• Publisher: Ace Books -
• Length: 320 Pages
• Weight: 0.35 lbs.