The book is called “on the derech” by rabbi yy rubinstein, and its a question answer book, answering basic questions of judaism. “how do we know we are right and theyre wrong” “can God really forgive the worst thing ive done?” “do rabbis ever make mistakes?”
He has another book called “thats life!” which i got after this one and its about how your life is a total of your relationship with Hashem and Yourself and others and he goes through personal and famous short storiees bringing out different aspects of each relationship.