[pkdpic]

Literally anything written by Liu Cuxin. Not overtly positive all the time but always infused with a deep historical optimism about humanity and the power of science + engineering.

Also I second Ministry for the Future.

Reading the newer translation of We right now also and the first 1/2 or so is weirdly positive. Not what I remembered at all.

[hoseja]

You and I must have read different books or imagine vastly different things under the term "optimism".