I am particularly interested in understanding whether this specific source is accurate, however, as I am looking for a pivot to further research. I assume this happens for a lot of us: you need a starting point, and picking the best possible one will enable better accuracy/less wasted time/ more cohesion in completing a 3x3 (ie I'm not looking for a short cut!).
It's difficult for me to read this book as it has been formatted/scanned to be online-- there is a weird/inconsistent replacement of n with x, for example, and I am having difficulty searching for sources as I don't have a good understanding of how these books are generally laid out vis a vis sources. Any suggestions on what to look for in this type of book, and does anyone know if this particular book is accurate, or should be ignored?