Hey. Recently I have started to read books in English. Since English is not my first language, I find it difficult to read fluently.
The only book I read in English and found no difficulties to read it, was The Catcher in the Rye. It was easy to me to read.
Now, I have bought these books in English:
One Flew Over The Cuckoo's Nest
The Great Gatsby
Gravity's Rainbow
Into The Wild
Which one of these books are the *less* vocabulary challenging?
Why not just read something from Hemingway? You know that you won't get a translation and you know it won't have too many unknown words?
I'd say Gatsby and Cuckoo's Nest are the easiest to read of the bunch you posted. Also, l'd suggest you read some of Pynchon's other works before diving into the Gravity's Rainbow.
Here's the /lit/ starter chart too. Moat of the books here are entry level, so you shouldn't have a problem with them.