Send No More Roses

It was published in the United States as The Siege of the Villa Lipp.

[1][2] Criminologist Professor Frits Krom visits Paul Firman, alias Oberholzer, a crooked investor.

Firman agrees to be interviewed at his villa on the French Riviera.

They come under attack by Firman's former business partner, Mat Tuakana.

[2] Kirkus Reviews wrote "You can be sure that Eric Ambler would never mix his metaphors, write an ungraceful line, or tell you a story you don't want to hear.