Erle Stanley Gardner 
Turn on the Heat [EPUB ebook] 

Strange bedfellows can be political poison, and the candidate had picked himself a dilly. She was ruthless and corrupt and had enough on him to smear his shining armour with front page mud. Donald Lam and Bertha Cool told him not to worry. Women were Donald’s speciality, the more dangerous the better. But when the lovely lady turned up dead, the case took an ugly twist. Suddenly Lam and Cool were in the middle of a red-hot race where bullets, not ballots, counted.