UMNEY'S LAST CASE PENGUIN 60s U.S.A. JULY 1995 & U.K. NOV 1996.
THE U.K. EDITION was also boxed in a Special Limited Edition from Blackwells Bookshops.
That's interesting, I never knew that Umney's Last Case was part of a small book set of other small stories, published in a slipcase. Makes total sense though.
What I find interesting is that they are both called Penguin 60s & from what I can tell the 60s has to do with the U.K. price that is marked on the back of all 10 books that are in the boxed set....Yet the U.S. edition was published almost one year before the U.K. book. But Penguin IS an England based company.