I went to amazon
and searched under "author", typed in merenstein, up came, 'Handbook of Neonatal Intensive Care'. If you search under the subject, neonatal nursing, you will find another book more "nursing" and "care plan" oriented, but it costs a LOT of $$$, merenstein is under $50. BE SURE you get the new one.
IMHO="in my humble opinion". Sometimes folks use it on BB's like this one.
Also, if you look through the NICU forum here, you'll find a lot of terrific info that can answer lots of questions, but if you still need more, we'll give it to you---best of luck. Neonatal nursing is a great specialty.