I have tried the following queries and they all return an object that contains an array of all the objects in the array.

dbCollection.find({ user: req.user._id, "books.type": type });
dbCollection.find({ user: req.user._id, books: { $elemMatch: { type } } });
dbCollection.find({ $and: [{ user: req.user._id }, { "books.type": type }] });
dbCollection.find({ user: req.user._id, "books.type": { $in: type } });
dbCollection.find({ user: req.user._id, "books.type": { $in: [type] });

How to get only those objects of array which match the condition instead of whole array?

>Solution :

This will work I think, give it a try

dbCollection.find(
            { user: req.user._id, "books.type": type },
            { user: 1, "books.$": 1 }
        )