"This volume collects material from Unknown worlds issue 20, Forbidden worlds issues 73, 94, 110, 114, and 116, and Herbie issues 1 through 5"--Vol. 1, t.p. verso.
"This volume collects material from Herbie issues 6 through 14, originally published in 1964, 1965 and 1966"--Vol. 2, t.p. verso.
"This volume collects material from Herbie issues #15 through #23, originally published in 1966 and 1967 by American Comics Group"--Vol. 3, t.p. verso.
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Herbie by Richard E. Hughes. ISBN 9781595823021. Published by Dark Horse Books in 2008. Publication and catalogue information, links to buy online and reader comments.
