"Elsewhen" suggests that the human mind is not bound to our here-and-now "slum of space-time" but can go voyaging into alternative timetracks of possibility.

A number of figures of "Lost Legacy", for example, are carried into Stranger in a Strange Land (1961), a book which ultimately could be said to have the same theme as the 1939 novella.

And the "multiverse" concept first explored in "Elsewhen" gets very full treatment in Heinlein's last novels, particularly The Number of the Beast (1980), The Cat Who Walks Through Walls (1985) and To Sail Beyond the Sunset (1987).

Boucher and McComas were unenthusiastic about the collection, saying it contained "two lightweight and entertaining novelets and two pretty weak short novels.

"[2] The New York Times reviewer Villiers Gerson reported the collection evidenced Heinlein's status as "one of the ablest craftsmen writing science fiction.