After posting my blog about the John Gardner first edition paperbacks, reader Dan Gale alerted me to something that I never knew. It's appears my UK Icebreaker is not a first edition after all, and this is obvious from the cover art. First editions of Icebreaker had an error in the artwork which resulted in the skull having "fangs". In actuality, they are not fangs, but sections of the artwork that should have been colored in black or cut out completely. This error was fixed on the second print onward.