This is the 2nd edition. Author Jens Gustedt has generously allowed a free version to be downloaded from his website.
If you like his book which is also published by Manning then you should consider buying a copy. He provides a 35% discount for the print or E book version.
I scanned the E-book and must admit, the bit on signal handling taught me a lot that I didn’t know.
The E-book is nearly 300 pages long in 19 chapters.