Known printings and dates:
12th October 1968
14th February 1969
17th October 1969
18th November 1969
Each known printing contains an ad on the last page to order additional Peanuts paperbacks. The listings change between printings. 12th printing lists for sale starting with d1164 and ends listing with d1113. 14th printings lists for sale starting with d1147 and ends listing with d1232. 17th printing lists for sale starting with D1147 and ending with D1288 on the colophon page. 18th printing has no for sale ad.