Erle Stanley Gardner 
Cut Thin to Win [EPUB ebook] 

Clayton Dawson came to Lam & Cool as a last resort. He needed an under-cover agent to ’protect the family name’. Bertha Cool didn’t want to take the case, but Donald Lam talked her into it when their client laid twelve one-hundred-dollar bulls on the table. What seemed a simple case of protecting an undisciplined daughter soon erupted into an explosion of trouble for Lam – trouble in the form of murder and blackmail.