Cheeky display preceding second-hand books launch? (8)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

MOON (to display one’s bottom) S (second) H (hand) OT (Old Testament); it’s interesting that in Rabbit Redux John Updike uses televised coverage of the 1969 moon landing (specifically the gobbledegook of the transcript between Mission Control and the modules) to point up the deathliness of the human relationships over there in the fictional twin towns of Brewer Mt Judge. For those who haven’t read Updike, he makes Ibsen look like Kingsley Amis.