The Alchemist, I had to read it for a community college class. It's probably the most predictable book I've ever read, but not in an entertaining way. Just painfully boring.
I read Siddhartha for highschool a couple years before, I would say that the books are almost identical, except I liked Siddhartha more.
You want a book with similar themes but actually amazing? The wizard of Earthsea.
I know the books aren't literally the same. But the vibes feel very similar. I want to say they have very similar structure, but my memory doesn't work that great.