There are 3 books in the Ribbon Duet series. The newest book is Ren and Della which came out in 2018.

1
The Boy and His Ribbon

Book cover of The Boy and His Ribbon
“What do you do when you meet your soul mate? No wait…that’s too easy. What do you do when you meet your soul mate and have to spend a lifetime loving him in secret? I’ll tell you what you do. You lie.” REN Ren was eight when he learned that…
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2
The Girl and Her Ren

Book cover of The Girl and Her Ren
“What do you do when you write down all your secrets? No…that’s not enough. What do you do when you write down all your secrets and the one person who should never read them does? I’ll tell you what you do. You hope.” REN Ren didn’t know the meaning of…

3
Ren and Della

Book cover of Ren and Della
From New York Times Bestseller, Pepper Winters, comes her most poignant tale yet. This edition contains both books: THE BOY & HIS RIBBON and THE GIRL & HER REN. The complete RIBBON DUET. “What do you do when you meet your soul mate? No wait…that’s too easy. What do you…