http://www.sfwa.org/other-resources/for-authors/writer-beware/agents/?fbclid=IwAR2q0Snl2-Y-qKplTMfDnjrS-E6sEdCIRuGfYqrTrDH20sfxSKwi9RIwTeg

The article linked above was mentioned elsewhere by a friend. It’s well worth reading.