Daughter of the Sun (I thought) was the title.
The book was given by my great grandmother to my mother. My mother is now 60 for reference.
The book was bound in a green fabric with gold accents.
The book was three separate love stories in one book .
The first story was Daughter of a Sun. Main characters name is Charlie (Charlotte). Charlie’s father disappears in the mountains and she ends up backpacking with a former student of her fathers through the mountains to solve the mysterious disappearance of her father. They end up finding her father who lives with a lost civilization. Takes place in South America.
Woman is an antiques appraiser and falls in love with an engaged client and helps the family find the missing will – that I believe was hidden in a door stop. Takes place in Europe.
Gill has arranged marriage with one brother (I think his name starts with an F) and falls in love with the other brother. She fell asleep in the wrong limo and ended up at a castle-like estate. The man she loves did a business merger with her grandfather. Lover calls her mouse. There is a problem with a landslide. Additionally, he is a race car driver. Takes place in Italy
This is the most important book I ever read because it came from my great grandmother. I have no idea who wrote it or if it is even possible to find. I would be humbled by any help.