THE FABULOUS RIVERBOAT The Felled Star (part 1) July 1967 Worlds of If	THE FABULOUS RIVERBOAT The Felled Star (part 2) August 1967 Worlds of If	THE FABULOUS RIVERBOAT The Fabulous Riverboat (part 1) June 1971 Worlds of If	THE FABULOUS RIVERBOAT The Fabulous Riverboat (part 2) August 1971 Worlds of If
THE FABULOUS RIVERBOAT 1971 Putnam 1st Hardcover	THE FABULOUS RIVERBOAT 1973 Berkley 1st Paperback	THE FABULOUS RIVERBOAT 1973 Rapp + Whiting 1st British Hardcover	THE FABULOUS RIVERBOAT 1975 Panther 1st British Paperback
THE FABULOUS RIVERBOAT 1978 Granada Reprint	THE FABULOUS RIVERBOAT 1979 Granada Reprint	THE FABULOUS RIVERBOAT 1980 Granada Reprint	THE FABULOUS RIVERBOAT 1980 Gregg Press Hardcover
THE FABULOUS RIVERBOAT 1980 Book Club Hardcover	THE FABULOUS RIVERBOAT 1981 Berkley Reprint	THE FABULOUS RIVERBOAT 1981 Berkley Reprint with variant cover	THE FABULOUS RIVERBOAT 1988 Grafton Reprint
THE FABULOUS RIVERBOAT 1993 Harper Collins British Paperback Reprint	THE FABULOUS RIVERBOAT 1998 Del Rey Trade Paperback Reprint