Debbie is the author of DNA and Social Networking and The Surnames Handbook. She is an Honorary Research Associate in the Department of Genetics, Evolution and Environment at University College London. She is a member of ISOGG and the co-founder of the ISOGG Wiki. She is the administrator of the Cruwys/Cruse/Cruise DNA Project, the Devon DNA Project and the mtDNA Haplogroup U4 Project. Her highly regarded blog Cruwys News, although originally set up to focus on her one-name study, has now evolved into the leading genetic genealogy blog in the UK.