Heard someone mentioned about the author Lawrence Block and found the ebook The Sins of the Fathers available from the library.
Overall not bad. Kind of nostalgic reading about the 70s. Will definitely see if can find the whole series.
Here is a review from Bing Chat:
The Sins of the Fathers is a gripping and gritty introduction to Matthew Scudder, a former cop turned private eye who operates in the dark and dangerous streets of New York City. Scudder is hired by a wealthy father to investigate the murder of his estranged son and his girlfriend (Bing's mistake. This should have been "his estranged daughter and her roommate"), but soon discovers that the case is more complex and twisted than it seems. The book is a masterful blend of mystery, suspense, and character study, as Scudder delves into the lives and secrets of the victims and their families, while also confronting his own demons and flaws. The Sins of the Fathers is a classic of hard-boiled fiction that will keep you hooked until the end.