Choose from options: Determine if the sentence is true based on the text below:
Under the name Griffiths she has written 2 series of horror novels.

Elly Griffiths is the pen name of Domenica de Rosa (born 17 august 1963, London), a British crime novelist. She has written two series as Griffiths to date, one featuring Ruth Galloway, the other featuring Detective Inspector Edgar Stephens and Max Mephisto.
Select from: a. Yes. b. It's impossible to say. c. No.