PMBOK was at the vesion 4 when I took the PMP exam, so it was great to refresh the PM methodology with this guide as it is based on the latest PMBOK version so far, which is the version 6. Additionally the book applies perfectly the PMP body of knowledge to managing small project, so that they are managed profesionally, but with the right amount of overhead and processes. The small project, as they are small, they might not require much overhead, but it is still necessary to keep some of the basics so that the right results are achieved. Great book. I really recommend it.