Fears are growing for a missing children's author who disappeared a week ago while walking her dog.
Helen Bailey, who started an emotional blog after the death of her husband five years ago, was last seen at around 2.45pm on April 11.
Hertfordshire Police are appealing for help to find the Royston author, who is believed to have taken her miniature Dachsund dog Boris with her.
The 51-year-old, who has written around 20 books for teenage girls, is best known for her Crazy World of Electra Brown series.
In 2011, her husband John Sinfield drowned during a holiday in Barbados, the same island where the pair had previously married.
Her blog Planet Grief, later turned into a book called When Bad Things Happen In Good Bikinis, described how she was "a wife at breakfast, but a widow by lunch".
In the most recent post on Planet Grief, she marked the five-year anniversary of Mr Sinfield's death, writing: "It was a perfect Caribbean evening, and we felt incredibly lucky. At that moment, life felt perfect.
"Twelve hours later, my husband was dead, drowning in the very sea we had dined beside the night before."
Ms Bailey, described as slim, with long black hair, has connections to London, Kent and Northumbria, police say.
Since 2013, the author had been living with her new partner and his two sons.
A Hertfordshire police spokesman said: "Concerns are growing for her welfare and police are urging Helen to make contact to let them know she is safe and well."
Anyone with information should call police on 101.
MORE ABOUT