Pebble in the Sky

This was not as good as I remembered.

The story used to work for me but doesn't anymore. No explanation for the time travel is even attempted. The conspiracy knot might have been fun but is not elaborated enough. The synapsifier's properties and capabilities. Mind control. The description of Pola. The final two pages after the resolution of the conflict.

This book just rubs me in the wrong way. YMMV.

Neither recommended nor recommended against.