DB #1 - Dorothy Dodds Baker, 1907-1968, US novelist and short story writer.
I can find no information about The Street or The Enemy. They may be short stories by DB#1. The other two works are associated: they have the same publisher - Thornhill Press, Gloucester, UK - and the same illustrator - James Dolby. They were both first published 6-8 years after DB#1's death. The LoC catalogue lists them separately from DB#1's works although the National Library of Australia has both as by 'Dorothy Baker 1907-1968'. I think the Australians are wrong!