David Merrill’s Reviews > Heavy Time > Status Update

I read some reviews of this book at some point. I read one negative review by someone who didn't like it because there wasn't anything beyond 60's technology in it. I grew up in the 60's. I don't remember any pocket card readers, space stations, interstellar drives. I'm wondering what planet they were on in the 60's. It definitely wasn't earth. This may require further investigation.