pb?Paperback. Typically 7" by 4.25" (18 cm by 11 cm) or smaller, though trimming errors can cause them to sometimes be slightly (less than 1/4 extra inch) taller or wider/deeper.
• No number line
• Note that the dates are for Canadian printings
• The first date conflicts with that given in the third US printing which has the month as November
• The artist is not credited, no visible signature; confirmed as Powers by Jane Frank
• Cover printed in the US, book in Canada
• The only '68 edition record on OCLC is a Panther