Seeds of Malice, livre audio

Book 11: Psychic Visions
Shunned by her friends, betrayed by her lover, charged with murder. Rinse, repeat.
After being acquitted of murder, botanist Fern Geller tells herself she's turning her back on the past. She intends to learn everything she can about poisonous plants by completing a six-month contract at the Garden of Death. Only then does she find the answer she seeks. But, when she returns to the conservatory where the first murder took place, she discovers the new boss is missing and several others are dead. Fern is once again the chief suspect.
FBI agent London Behring should know best that appearances can be deceptive, and deadly. Fern is as beautiful as an angel, and just as gentle. He can hardly believe someone would accuse her of murder. The first set of murder charges against her had been dismissed. The question is, why would she come back to the scene of the crime – at the very moment she would fall under suspicion a second time? Does she possess the seeds of malice that would be required to walk away after committing so many crimes?
The one thing London knows he needs to do is keep his guard up at all times while he finds out the truth. Fern's charm could prove to be the very lure that's impossible for him to resist.