I would definitely NOT suggest any books by Mr. Slifkin. Despite all the howls of the liberals, his had at least one book banned by the Gedolim for very good reason.
He actually believes the world is millions of years old.
Now all the liberals on the religious-left can come and defend him, defenseless as he is. (I’m sure if I criticized Moses Mendelsohn, some of the same crown would defend him too.)