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Isabel Ostrander

7 volumes in the collection.

Isabel Ostrander

Isabel Ostrander

Isabel Egenton Ostrander (1883–1924) was an American mystery writer of the early twentieth century who used her own name and the pseudonyms Robert Orr Chipperfield, David Fox, and Douglas Grant. Christopher B. Booth is falsely credited as a pseudonym of hers.

Biography from Wikipedia, CC BY-SA 4.0. Portrait: via Wikipedia (see source).

The twenty-six clues

Isabel Ostrander

Suspense

Isabel Ostrander

Anything Once

Isabel Ostrander · Paul Stahr

Annihilation

Isabel Ostrander

Ashes to ashes

Isabel Ostrander

The Crevice

William J. Burns · Isabel Ostrander +1

The Fifth Ace

Isabel Ostrander · George W. Gage