These were my three favorite (?!) reading experiences in 2015:
Gravity’s Rainbow by Thomas Pynchon. 1973 first edition trade paperback by Viking. Cover design and illustration by Marc Getter.
Autobiography of Red by Anne Carson. First Vintage Contemporaries edition, trade paperback, 1998. Cover design by Carol Devine Carson.
Mumbo Jumbo by Ishmael Reed. 1978 mass market paperback by Bard Books, a division of Avon Books. No designer or illustrator credited.