Can I Get There by Candlelight?
Why this book?
This book is technically more ghost/time travel than strictly fantasy, but it was the book that opened my eyes to the idea of “portal fantasy.” It’s the story of a teenage girl in an old mansion who is able, with her horse, Candlelight, to travel through a portal and meet the girl who lived in the mansion many years before her. It was mysterious, slightly spooky, and used the idea of parallel worlds in such a unique way. I read hundreds of books as a teen, but this one really stuck with me.