Left: Alice in Wonderland and Through the looking Glass (Children’s Classics).
Published 1993, Parragon Plus. Paperback. No illustrations.
Right: Alice in Wonderland, with Tenniel illustrations. Spine says ‘Parragon’, but title page gives copyright to William Collins.
The ISBN on the cover is 5019477000593, but that now seems to be identified with The Secret Garden by the same publishers.