I picked up this 60 page guide when I was having low back problems involving a slight nerve impingement. The good news is that it provided enough information to eliminate lumbar herniated disc as cause of my particular problem. That’s not saying nothing because low back problems are notoriously difficult to pinpoint and a cause often remains undiagnosed. The bad news is that this, inexpensive but not free, guide didn’t offer anything that couldn’t be found at respectable online sites like WebMD or The Mayo Clinic for free.
The guide is organized into 11 brief chapters that run from understanding what a lumbar disc is and how it becomes herniated through various treatments (self- and doctor-administered.) It also explains when the situation warrants seeing a doctor.
There are plenty of graphics in the book from computer-generated anatomical imagery to simple line drawings. They are beneficial to understanding the nature of the condition.
My recommendation would be to consider whether you need to have access to this information at times when you don’t have access to the internet. If that’s the case, it’s worth the small cost. If not, you’ll probably feel it didn’t really offer any value-added over free online sites.