Recommend you a book,

"What's Going on in There? : How the Brain and Mind Develop in the First Five Years of Life (Paperback)"
http://www.amazon.com/Whats-Going-There-Brain-Develop/dp/0553378252/ref=pd_bbs_sr_1?ie=UTF8&s=books&qid=1197604846&sr=1-1

This book is very good. Detailing brain development. It is an easy read. I feel it will be very helpful to you.

Another good book is,
"The Scientist in the Crib : What Early Learning Tells Us About the Mind [BARGAIN PRICE] (Paperback)"
http://www.amazon.com/Scientist-Crib-Early-Learning-Tells/dp/B000GG4ZFY/ref=pd_sim_b_img_3

Best wishes to your baby and your family.