Four paperbacks by Frank Herbert.

Dune - uncreased spine, no writing, no folded page corners

The White Plague - spine is curved but solidly bound, no writing, no folded page corners, shows age

The Green Brain-tight square uncreased spine, no writing, no folded page corners.  A nice vintage copy

The Dosadi Experiment and The Eyes of Heisenberg - square uncreased spine, no writing, no folded page corners.  Very lightly read.