These cover designs for Penguin Education are great.

Juniors, cover design by: Omnific/Philip Thompson.

Personality, design by: Omnific/George Mayhew.

Half Way There, design by: Omnific/Martin Causer.

Ageing, design by: Omnific/Derek Birdsall.

Males & Females, design by: Omnific/Derek Birdsall.

Courtesy of avid Penguin collector Richard Weston.

You can view Richard's complete series of covers in the Penguin Books Flickr collection.

Related: Designing book covers.