Re: Greetings!
Welcome Minx!
I am not sure what you mean when you say challenging. I have read quite a few that I never bothered to finish, but to me that means they are boring.
There was one book that I just couldn't stop reading about 30 years ago. It was a true story of a young woman who agreed to marry a stranger & live with him on a desert island for a year. It was such an adventure with many things that made you worry for both of them.
The young woman wrote the book herself & it was
" Castaway" by Lucy Irvine. She wrote a few others about her different adventures ( which were good) and I understand that she now lives a reclusive life in Bulgaria.
If I read the book again now, I am sure I would still feel as worried for her, as I did when I first read it... even though I know she survived!