Mr. Calder and Mr. Behrens (book)

Mr. Calder and Mr. Behrens is a 1982 short story collection by the British crime and spy writer Michael Gilbert featuring his eponymous counter-intelligence agents. It was published by Hodder & Stoughton in the UK and by Harper & Row in the US. The book was Gilbert's second collection of Calder and Behrens stories, following "Game Without Rules" (1967).
Stories.
The book contains the following stories, all originally published in "Ellery Queen's Mystery Magazine":
Literary criticism.
"Kirkus Reviews" called the stories "a tidy assortment" for those who enjoy leisurely, literate espionage vignettes, even though few are plausible and the humour "sometimes dry to the point of invisibility".
Adaptations.
A series of twenty radio plays by Gilbert under the general title "Game without Rules" was broadcast by BBC Radio 2 between October 1968 and January 1969, including the following derived from stories collected in this anthology: