This is a short Perry Mason book (171 pages, but the short chapters make it seem like less). When a woman is framed for carrying narcotics, Perry Mason proves her innocence, but it turns out that the charge was part of a greater plot to discredit her as a witness for a will of a wealthy woman. When the wealthy woman’s recent bouts of stomach illness prove to be arsenic exposure, Mason semi-investigates but has to find out the real story when his client is charged with her murder.
It’s a Perry Mason novel. Quick, pulpy, and not dated much. I cannot get enough of them, and someday I hope to own the complete set in Walter Black editions.