Would the publisher of The Grapes of Wrath be a scholarly press?
I would guess that a scholarly press is a publisher of original books and reprints of books used for schools. Can't give an opinion on the publisher of Grapes without knowing who published the copy you're refering to.
A scholarly press is usually a university press. The publisher I saw was Penguin. So unless you have a special edition that has lots of analysis by some professor, published by some university, the answer is no.
