Once or twice a year Penguin put out a set of 20 small books culled from their classics backlist. Sometimes it's a set of Great Ideas, or else Great Loves or Great Journeys. In April next year they're doing the same thing with English Journeys. Most of the books do not yet have covers, and none of the books is yet listed in the Penguin catalogue, but here are the few covers I've managed to scrounge.
Plus a couple of unfinalised ones...
I'm not sure of the designer/illustrator behind these yet. On past form I'd guess at David Pearson, but time will tell.
CORRECTION: Coralie Bickford-Smith has kindly pointed out that these are, in fact, the work of Nathan Burton. Nice one!