Traps need fresh bait (A Donald Lam-Bertha Cool mystery)

Bertha Cool was purring like a kitten. A client had just hired the agency to investigate a suspected insurance swindle and, in Bertha's glittering eyes, that was just the sort of respectable case they needed. Donald Lam had his doubts but he began looking around for suitable bait to set the trap. What he didn't know was that the trap was already baIted - and more than ready to spring.