Mothering Twins: From Hearing the News to Beyond the Terrible Twos. This is a GREAT book and was the first one I read after hearing the news that I was going to have twins. In fact it was given to me as a gift from another twins mom. It was the perfect gift for an expectant twins mom and is definitely a TwinzGear "GREAT GEAR" pick.
I particularly liked how it very clearly broke down all the various things that we might expect if our boys came early. It was a great way to prepare ourselves for what turned out to be a reality for our family.