The book Fortune's Fool is a light, easy read.
Fortune's fool (seventh son) is Sasha. An easy-going fellow with a keen sense of duty and a delight in doing pranks.
Katya is the seventh daughter of the Sea King with a keen ability to spy out and resolve issues on the behalf of her father.
They are happy with their lives. Though occasionally feeling somewhat dissatisfied, thinking there must be something more.
And then paths cross. Delight in each occurs. Evil threatens.
Help is needed and comes from unexpected quarters.
They stay true to who they are and evil is beaten.
(can't give too many details or one ruins the story!)
IF you like fantasy.
If you like light-hearted, easy reading books.
Then this book will suit you well I think.
So go ahead, grab a copy and lose yourself to the world of the Sea King and Led Belarus. You'll be glad you did. :)