My son got this book for Christmas its called "I Love You Because You're You" by Liza Baker, it is so sweet and cute!!

If you give a mouse a Cookie is fun too.

My kids loved any Sandra Boynton board books. Very colorful and memorable little sing-songy stories. "Pajama Time" was the most popular with them.

Link

Goodnight Moon is my all-time favorite. There's also a fun series of books called Good Night Our World, with numerous titles. (Link Very fun way to introduce different places, seasons, salutations, etc.

Dr. Seuss for sure! Those are fun because of the rhyming, and the photos are awesome to look at. I love "Green Eggs and Ham"! Also, any books with animals are great too. My friend has a baby (well, she's 19 months now) who LOVES animal books and because my friend read the book to her when she was much younger, she actually pulls out the book and asks everyone to read it to her. She also makes the cutest animal noises whenever she sees a cow or a cat.