Dump the book concept... they are floating on air not ready to read..... If you really feel you must.... buy them a Books a Million gift certificate...
Next Just be happy for them.... it is THAT simple..... they will have strangers and family and "friends" a plenty telling them how awful their labor was or how big they got, or didn't get.. They will have people touching the Bump with or without asking... You want to be the Cool Bud right?? No Problem... I can give you detailed instructions on how to make a "cake" out of diapers, receiving blankets and rattles/
I am not sure how old You are... so that makes it a little bit more difficult . If you were my age you would be handling it differently than if you are a contemporary...but the general thought is the same... Be happy for them. don't scold because they do not have the college fund started...don't give more than you can easily afford and they truly need, and be prepared to understand as the great expectation goes on there will be days they are amped and days they are close to devastated... that is the realization of parenting.
If you want to be ultra cool get them the Parenting Magazines.... Parents.... and Simple Living are both very cool... lots of great articles and more importantly to most young parents both the acknowledgment they are going to be real adults and parents ... AND the coupons / advertisements.
If they have a dog (s) then get info on how to complete the family by adding a two legger, print it out and put it in a cool binder that has lots of space for other articles etc.... Put a couple of coupons saying you will walk the dog when they have the bahy etc ...
What ever you do Do NOT overwhelm them... do not hover and try to be everything at all times. Very loving and friendly people article don't tell them how massively life will now change just ket then know as adpotive aunti or mom You need to suppor t her now.... Give him kudos for anthy and everything they do well on their own. Make mistakes just a simple funny in growing up.
This is based off of over 30 years experience I am still good friends with every child they all pop out and I am God parent to a handful...Why? you can not teach anyone anything they think they already know or are fated to handle. All you can do is be happy for them and let them know you are there and care.
Bonita of Bwana