Dream Girl — Robert B. Parker

When a mature, beautiful and composed April Kyle strides into Spenser's office, the Boston PI recognises his once and future client. Now a well established madam herself, April oversees an upscale call girl operation in Boston's Back Bay. Still looking for Spenser's approval, she hesitates before asking for his help again. Her all female business is a success but some men are trying to take it away from her and she needs Spenser's help. She claims not to know who the threats are coming from, but when Spencer investigates he finds a troubling surprise.