Publication date from 1982 Bantam paperback, whose copyright page states (quote four lines):
Printing History
Parnassus Press/Houghton Mifflin edition published August 1963
8 printings through January 1981
Bantam edition / June 1982
Kirkus Reviews reports publ date 1963-05-01, in a contemporary review as posted online with later cover image and ISBN (see the novel record).
Price from review by Aileen Pippett in "Ages 9 to 12: Stories ..." NY Times 1963-11-10 pBR220
Library of Congress catalog record of the book (LCCN, below) credits illustrations by Peggie Bach, but does not link her name. As of 2016-10-29 the library does not clearly identify her; probably she has no author LCCN. (Peggy Bach {{LCCN|n88-004853}} is not a strong candidate.)
Peggy Bach cover art credit is inferred from comparison of the credited interior illustrations with verified cover image of the undated 6th printing see.
