https://www.youtini.com/collection/getting-started-guide

The first one they recommend is [i][b]Lost Stars[/b][/i]

https://www.youtini.com/book/lost-stars

[quote][b]OUR SYNOPSIS
[i]NO SPOILERS[/i][/b]
You may be familiar with the events of Star Wars’ Original Trilogy, but Lost Stars manages to re-explore its major plot points through the eyes of brand new characters Ciena Ree and Thane Kyrell. Along the way, it tells a love story that rivals that of Anakin and Padme.

Claudia Gray is among the elite Star Wars authors when it comes to crafting compelling stories. This books excels by giving a fresh take on the Star Wars story fans already know and love.[/quote]

The material in this book is considered canon.  Hope that helps.