I've mixed feelings about this book. Reading it I haven't found any new information for me and my general impression is that it doesn't contain any valuable addition to what you can find on online documentation. Some parts are also somehow pedantic (as the step by step installation process of VirtualBox with pictures) and look more like fillers. Still I have to recognize that this book may give value and be useful for who doesn't already know Vagrant, and that's probably the proper target for a similar book. Get it if you want to learn about Vagrant and don't want to wander on online documentation. If you are already using and comfortable with Vagrant you won't probably need it.