Easy to read books for a beginner which are interesting and fast paced

I’m trying to get my girlfriend into reading. Actually, she reads, but it’s only the simple self help type books. It’s her comfort genre, but I feel like most of them are repetative and she’ll enjoy other genres too, if she gave them a try.
Nothing against what she reads now, but a little bit of variety shouldn’t hurt

My attempts so far:
The ocean at the end of the lane: She tried but gave up. She was sooo close though!!!
And then there were none: Blazed through this one. And loved it

I’m thinking I’ll give her the Percy Jackson books next. That was where I fell in love with reading. Maybe she’ll like them too

Her reading level is in the beginner-intermediate zone.

Please recommend books of any genre (maybe not self help though)

by highlyuglymug