Poisoning

Free to read here, from Project Gutenberg.

What to do in cases of accidents and emergencies

J. B. Lawrence

Poison Romance and Poison Mysteries

C. J. S. Thompson, also an audiobook

Strong poison

Dorothy L. Sayers

The Return of Dr. Fu-Manchu

Sax Rohmer, also an audiobook

The Most Extraordinary Trial of William Palmer, for the Rugeley Poisonings, which lasted Twelve Days

Anonymous, also an audiobook