Others have said some of this, but it's good to know that more than one person has the same opinion. I can't sit on my computer to read this like a book of this nature (I would categorize it as a fund to read text-book). This, of course, then ties into the inability to save my progression/stopping point. Lastly, the Table Of Contents isn't linked to the sections they represent, so if I wanted access Chapter 31: Natural Swimming Pools, subsection "Keeping the water clean" quickly, it's like trying to hit a moving target as the reader lags.