I picked up this book to prepare for the NetPractice project at 42 Seoul. The cover says you can learn it in 10 days, but if I had read it in concentrated sessions, I could have finished it even before 10 days.
I read a bit, then studied for NetPractice, and during that time it overlapped with a study group where several of us were working on miniRT together, so I worked on miniRT in the middle and after the study group ended, I wanted to read the rest so I started reading again.

The book is really well made. The content progresses in a conversational format, and rather than studying the OSI 7 layers on the internet, reading this book once was much more comfortable as it explains the OSI 7 layers along with what happens at each layer, what equipment is used, and key concepts together.
The NetPractice project involves setting up IPs and SubnetMasks matching Class A through C from devices like the internet, routers, and switches, so reading up to the network layer of this book should be enough to complete the project.
It was easier to understand than other blogs because it explains IP and Mask configuration methods with examples and images.

Also, unlike the encapsulation concept used in languages like Java, there were explanations about attaching headers (encapsulation) and removing them (decapsulation) at each layer, which helped me understand that data really contains a lot of information.

What I particularly liked was LESSON 32 on data transmission and processing at the LAN card, where Figure 8-3 visualized the network configuration represented by the OSI model, showing the layers processed by each device, which made it really easy to understand. You can see from the image below why I liked it so much.

The page count isn't that many and you can study networking in an easy and fun way.
I highly recommend reading it at least once in your lifetime.