Here is a list of the folks I spoke with for the book:
Elton John
Bruce Springsteen
Willie Nelson
Eric Clapton
Steve Winwood
Rita Coolidge
Randy Newman
Dave Mason
T Bone Burnett
Bruce Hornsby
Ronnie Milsap
Susan Tedeschi
Derek Trucks
Paul Shaffer
Jim Keltner
James Burton
Lenny Waronker
Jon Landau
Russ Titelman
Claudia Lennear
Cheech Marin
Richard Carpenter
Glyn Johns
Steve Cropper
Terry Manning
Gary Lewis
Ian Hunter
Dwight Twilley
Van Dyke Parks
Bobby Whitlock
Dean Torrence
Taylor Hackford
Ken Burns
Don Preston
Sonny Curtis
Chris Stainton
Bobby Keys (previous)
Al Schmitt
Charlie McCoy
Sam Bush
Jim Horn
A.J. Croce
Bobby Hart
Jim Price
Roger Linn
Christine O’Dell
Johnny Barbis
Jim Halsey
Don Randi
Barney Cordell
Marc Benno
Jim Karstein
Jan Bridges
Johnny Williams
Linda Wolfe
Keith Allison
Don Nix
Steve Martin
Patrick Henderson
Michael Johnstone
Don Williams
Halen Harris
John Gallie
Daniel Moore
Sugaree Bridges
Jack Wessell
David Teegarden
Mark Lambert
Ron Henry
Tina Rose
Wally Wilson
Charlene Ripley
David Davis
Connie Nelson
Gordon Rudd
James Mankey
Pamela Polland
Sandy Konikoff
Bruce Robb
Stuart Margolin
Bobby Torres
Bill Bentley
Robb Royer
Syd Straw
Michael P. Graham
Alan Baker
Mary Jones
Rick Huskey
Harrod Blank
Kate Hyman
Richard Feldman
Maureen Gosling
Jim Franklin
Owen Sloane
Tommy Vicari
Bob Morris
Tom Russell
Marlin Green
Harold Thompson
Maxayn Lewis
Fiona Fitzherbert
Ann Bell Nicholson
Julie Chapman
Kirk Bressler
Wayne Perkins
Mike Scott
Gary Ogan
Frank Latouf
Herb Alpert
Bob Britt
Tom Britt
Taylor Hanson
Beau Charon
Jeff Moore
Larry Shaffer
Brandon Holder
Jack Randall
John McDonnell
Charles Thompson
Danny Campbell
Chris Simmons
Paul Lee
Jesse Lauter
Bobby Roberts
Matt Harris
Paul Brewer
Matthew Moore
Coco Bridges
Marjoe Gortner
Wornell Jones
Blue Bridges-Fox
Peter Nicholls
John Cowan
John McEuen