Complex sentence: The first 28 were published without a cover illustration, in a salmon colored paper wrapper, but a woodblock print was added with issue 29, and reprints of the first 28 had an illustration added to the cover.
Split into simpler sentences: The first 28 were published without a cover illustration, in a salmon colored paper wrapper. A woodblock print was added with issue 29, and reprints of the first 28 had an illustration added to the cover.