A lot of people think of Market Wizards as the first book in it's style to have interviews with leading traders and that is incorrect because in 1986 Kevin Koy published The Big Hitters: Interviews with The World's Foremost Market Movers and the list of interviewees is:
Richard Dennis
Clayton Yeutter
Tom Willis and Bob Jenkins
Richard Sandor
David Heuwetter
Brian Monieson
Tom Baldwin
Charlie Andrews
Robert Prechter
J. Peter Steidlmayer
The Big Hitters was published by Intermarket Publishing which also published a magazine called Intermarket. If anyone has any or knows where I can find some, please let me know because I can't find them anywhere.
Kevin Koy was also the coauthor with Pete Steidlmayer of Markets and Market Logic.
Anyways, there are a limited number of copies of The Big Hitters in the $30 range still available on the internet and I figure it'll get more scarce as time goes on.