Perry, Warner: The Emerald Mystery ©1945 MARS Magic, Washington, D.C. Softcover, saddle-stitched, 5.5x8.5", 5 pages. Second Edition ©1947 Lloyd E. Jones, Oakland, CA

Image courtesy eBay seller BatCountryBooks

Contents (from book):

1 Introduction
1 Effect: Spectator's cards of one suit match same order as Magician's cards of another suit
1 Preparation: uses two decks
1 Procedure
2 - Double Shuffle
3 - Packet Switch
4 - Conclusion
4 Notes on Presentation
6 Advertisement: other items available from Magic Limited