Of course, I love the front of this, geometric shapes, overprinting, oddball colors…
70s book design, seventies graphic design, overprinting, magenta, abstract geometric shapes

But I also really love these two aspects of the jacket.

1.) the back is just white:
book jacket 70s

2.) They overprinted the green and pink to get a dark brown for this halftone of the author on the flap:
overprinting, 70s book jacket design, seventies graphics

No design credit unfortunately.