am deeply indebted to the following people and organizations:

Tim Cole, who designed Black Thunder and served as my patient and enthusiastic technical adviser.

Randy Geisler and The American Coaster Enthusiasts. The National Down Syndrome Congress.

My friends and fellow authors, who answered all the questions I couldn't: Joan Johnston, Jayne Ann Krentz, Kathleen Gilles Seidel. And Meryl Sawyer, for help above and beyond the call of duty.

Linda Barlow for her thoughtful critique and unflagging friendship.

Steve Axelrod for his continued wise counsel, and Claire Zion for her insights and support.

The members of my family who give me so much.

And my readers, who continue to enrich my life with their warmth and enthusiasm.

Susan Elizabeth Phillips c/o Pocket Books 1230 Avenue of the Americas New York, NY 10020