Poisonous Seed. A Frances Doughty Mystery 1, Paperback/Linda Stratmann

When a customer of William Doughty's chemist shop dies of strychnine poisoning after drinking medicine he dispensed, William is blamed, and the family faces ruin. There will be more deaths, and a secret in her own family will be revealed before the killer is unmasked, and Frances will find that her life has changed forever.