Deborah O'Toole is the author of more than seventy books in multiple genres. She is author of Celtic Remnants, a novel of enduring yet impossible love and betrayal set in the turbulence of Ireland. She is also author of Glinhaven, Mind Sweeper and The Crypt Artist.

Writing as Deidre Dalton, she is author of the Collective Obsessions Saga, an eight-part series which chronicles the lives of two families sweeping a span of more than one-hundred-forty years, all set against the backdrop of a Gothic seaside mansion in Maine. She is also author of the Bloodline Trilogy, which follows the magical journey of three women through time.

Writing as Shenanchie O'Toole, she is the author of twelve cookbooks and more than forty titles in the exclusive Food Fare Culinary Collection.