You should always read as much as you can before you get any pet reptile. Information found on the internet isn't always correct.
Having a reference books is handy in case you need a quick look at setting up your enclosure, proper temperatures, finding out what you need for your pet.
Bearded dragons can be great pets, but if you don't know how to take care of them you can cause them to have a lot of health issues.
Do your homework before you get a pet. A book is a great start.

Pros: getting information is helpful to keeping your pet healthy

Cons:

This book was great when I started with my bearded dragon, but i soon found that some of the information found in this book conflicted with what a lot of vets recommend. This is a great book, but i suggest you buy more than one book for these finicky animals.

Pros: Good for the beginner

Cons: conflicted with other sources

this book has told me everything i need to know!!

Pros: this book is great!

Cons: none