Some Summer Lands

From Author Wars - https://authorwars.com/publications/some-summer-lands-31084.html

Overview:

Title: Some Summer Lands
Author: Jane Gaskell
Year: Unpublished
ISBN-10: 0356121186
Publisher: Macdonald
Price: £8.95
Pages: 352
Binding: Hardcover
Type: Novel
Title Reference: Some Summer Lands
Notes: Data from Locus which states: "Reprint (Hodder & Stoughton 1977) fantasy novel, conclusion of the "Atlan" series. Library edition." Not trace of ISBN found using ISBN search or Addall No libraries have a copy (at least none that could be found), OCLC/WorldCat and other bibliographic sites don't find it. Probably unpublished / never distributed to libraries.