Who?

From Author Wars - https://authorwars.com/books/who-1291748.html

Overview:

Title: Who?
Author: Alun Hood
Year: 1979
Type: Cover Art

Variant Titles:

1982. Sirius, #76

Editions/Publications:

Unknown. Who? (Unknown, Alun Hood, Fontana, ISBN-10: 0006154085, £0.95, 189 pages, Paperback, Novel)