Edition: First US printing.
New York: Macmillan, (1967) dj. Hardcover first edition - The author's first book for children, the story of summer adventures of three boys - Hilding, Bertil and Tubbo - who live in the same block in Stockholm. Translated from Swedish by Annabelle MacMillan. Illustrated with drawings by Stan Tusan. An early reading chapter book. 138 pp.
Condition: Fine in near fine dust jacket (small peeled spot from sticker removal, little wear at the top of the dj spine)