London, Methuen, 1897. First edition, first impression. Hardback. A very good copy. Collects 17 stories, including the titular story which is an early example of parallel worlds. The Argonauts of the Air looks at manned flight. The Sea Raiders is a kraken yarn. The Red Room is a gothic tale. Something for everyone! 40pp catalogue dated March 1897. Slight toning to the spine, and a slight lean. Some bumping to the spine tips. A nice copy. [9295, Hyraxia Books].