A good resource to buy when you are expecting is an informative pregnancy book. There are a wide variety of different topics that are covered in a pregnancy book that you will need to address.
Probably one of the most important things you should look for when choosing a pregnancy book is that it has a section that will explain the bodily changes you will experience as you progress through the next nine months.
This will help to ensure that you are more prepared for what's to come and won't have any surprises that could potentially scare you. Learn about all the signs and symptoms of the various stages because this will also help you learn what you need to be asking your doctor when you make visits. If you think there is something abnormal about how you are feeling or what your body is going through, it will be important to address this in these sessions.
A second topic to look for when you visit the library or store is what you can do to help yourself during this time. This could be information on exercises to perform, foods you should be eating (or making sure to avoid) or suggestions on how to combat the stress you may experience. All of these issues will help you gain control over your body and emotions and make the whole period run a lot smoother.
Be sure to ask your doctor for a reference as well. They may know of a specific book you should pick up as they feel it is most beneficial. If you have a special circumstance (for instance, if you are a diabetic who is expecting) try and find some information that is tailored to your needs. Your diet will likely need to be slightly different than someone who isn't a diabetic.
Try and get as much help as you can throughout the next nine months. Any type of print material will be beneficial, as will talking with others who have gone through the birthing process.