Book: Penguin By Design: A Cover Story 1935-2005 ~ Phil Baines
The design history of Penguin paperbacks (and Pelican plus additional imprints) from the beginning, in full color with hundreds of covers spanning all eras and lines. Incredibly inspiring, even if it only includes a small percentage of everything the company has published. It’s going to be where I turn when I’m stuck for zine cover designs. (Fair warning: expect a 30s-era Penguin cover homage for an upcoming zine issue.)
There are many collections of Penguin covers online as well.
