Highly Commended for Children's Book Council of Australia 1973 Book of the Year.
Reviewed briefly among other children's books:
-- Jill Paton Walsh
The Guardian 1972-11-08 p10 "Spell makers and breakers" review column by (Wrightson a spell-breaker in this one, unfortunately)
-- Naomi Lewis
The Observer 1972-11-26 p37 "Over the edge" (this one for under-10s; "a citypiece, and wholly successful")
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Unknown whether this preceded the UK and US eds., simultaneous or nearly so.
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Highly Commended for Children's Book Council of Australia 1973 Book of the Year
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Data from 1973 reprint
[One ABEbooks bookseller 2016-05-24 shows a cover image for the 1st Reprint 1973, which incorporates a larger version of the same illustration with greater extent and color spectrum, and displays a seal "Highly Commended" etc.]
WorldCat record {{OCLC|723562549}} reports a 1973 reprint.
As of 2016-05-24 multiple booksellers at ABEbooks.co.uk show the same front cover stock image, and same ISBN, for Hutchinson Australia and Hutchinson [UK] eds.
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Library of Congress and WorldCat (LCCN and OCLC, below) give page-count 151, as 1972 for the 1st printing presumably.