We started reading to my daughter when she was 4 months old, and from that time until she was well over a year she didn't like books with cartoon illustrations. She only wanted to look at books with photos of real things. (I suspect the hand-drawn illustrations were just too abstract for her wee brain.) Well, there aren't a lot of baby books with photos, but she loved this one, as well as CAT by Van Fleet. Photos of animals, fun rhyming text, stuff to touch, and things that move. Everything a baby could want.
(And by the way, my daughter is now almost 3. This, CAT, and MOO are the only 3 books from her babyhood that she still has on her shelf and STILL enjoys. Find me another book or author that appeals to children from the age of 4 months right through to 3 years, I defy you.)