Found a glaring error in the first few pages:  'something with a 3 at the top and an on the bottom'.  It should be 'something with a 3 at the top and an 8 on the bottom'.  Stuck out like a sore thumb and frankly, soured the reading experience.  How many more typos can I look forward to?  I bought the physical book many years ago, but wanted a more convenient form to read.  The kindle price was right so I'll keep it, but the proof reading is sub-par.  Disappointed.