Thanks. We do have one of the books (brown bear) and it's one of his fav. Again I have to confess it's my fault not enjoying the process :/ I'll just drag on and keep up the smile face till he is a little older and we can expand the reading materials.
Perhaps you yourself would enjoy "My Very First Book of Shapes" better, where the baby needs to match real life objects with abstract shapes (e.g., wagon/rectangle, sun/circle). Should be able to do it in a few months give or take.