United Kingdom, April 15 -- Geri Horner found writing her new book to be the "hardest thing" she's ever done.

The 52-year-old star's latest work, 'Rosie Frost: Ice on Fire' - the follow-up to her 2023 story 'Rosie Frost and the Falcon Queen' - has found it takes a "massive" amount of "mental stamina" to pen a novel but she insisted the effort was worth it in the end.

She told US TV show 'Extra': "It is probably the hardest thing I've ever done.

"The mental stamina of completing a novel is massive, like, to remember what you did in that bit .

"It's sort of like, 'Oh, my God.'

"To really show up for it is massive, but then when you see the cover and response, then there's something really thrilling about it and you think, 'Wow... then ...