In the publisher’s trial binding. Second printing in paperback. Publisher’s original illustrated wrappers showing Faun and Girl by Clarence White, with a (frankly unsuccessful) snowfall effect to the wrappers.
 
A very good copy.
 
An intriguing copy of the Secret History, in a trial binding of illustrated paper wrappers with a snowfall effect to the covers and flaps. It has been suggested that these were prepared for the first printing in paperback, but deemed an unsuccessful experiment and so were then reserved and issued on a small number of second printings.