Finished at last! I got this collection ages ago, and have been reading it a story at a time in between other books. It is a collection of (fairly) short stories, mostly sci-if based, some fairly decent, some a bit dull, with a particular emphasis on multiverse theory. Written in the 50s and 60s it is interesting to see a writer’s idea of what the future will be like. Lots of space travel of course, plus mini atomic engines powering everything. Guns feature heavily as does smoking. Apparently there will be a lot of smoking in the future. Oh, and good old fashioned gender roles.