Rowling. Harry Potter and the Prisoner of Azkaban, Purple Proof Copy

Rowling (J.K.)
Harry Potter and the Prisoner of Azkaban,
First edition, Uncorrected proof, one of 31 copies [as per memo now discovered dated January 1999 from Roz de la Hay of Bloomsbury Publishing], original printed soft purple stiff paper covers, slightly handled with small stain to upper cover, internally fine, [ Errington AA4(a)], 8vo., Bloomsbury, 1999 [Actually printed 1998]