Greg Lehey wrote an excellent review of The Practice of System and Network Administration in the new issue of The FreeBSD journal. Even though the book isn't FreeBSD-specific, I'm glad FJ was drawn to reviewing the book.
For more about the FreeBSD Journal, including how to subscribe or purchase single issues, visit their website: https://www.freebsdfoundation.org/journal
I'm a subscribed to the journal and I highly recommend it. The articles are top notch. Even if you don't use FreeBSD, the articles are a great way to learn about advanced technology and keep up with the industry.