            extra notes for The Enigma of the Spiral Waves A few errata have been brought to our attention concerning early printings of Volume 2: On p.6, "could have be chosen" should be "could have been chosen" On p.41, the final entry in the table should be "1000.5772884...", not "100.5779433..." On p.47, "It's graph" should be "Its graph" On p.70, the second illustration gives the wrong value for the Riemann zero in question (should be 1/2  21.02204i) On p.73, "1 - 0 = 0" should be "1 - 0 = 1" [A serious error! Ouch!] On p.86, "it's pairs" should be "its pairs" On p.110 "has been has been" should be "has been" On p.135, "s;pace-time" should be "space-time" On p.202, "where the the waves" should be "where the waves" On p.215, note 6: "and then subtract 5.069, giving the final answer 801.826.... So there are approximately 801.826... nontrivial zeros in this region according to this approximate logarithmic formula. The actual number is 649, so we have only 76.5% accuracy at this "height"  not particularly good. The higher you go, though, the more accurate the formula becomes" should be "and then subtract 159.155, giving the final answer 647.741.... So there are approximately 647.741 nontrivial zeros in this region according to this approximate logarithmic formula. The actual number is 649, so we have 99.8% accuracy at this "height". And the higher you go, the more accurate the formula becomes" On p.223, "your feet are were" should be "your feet are" On p.223 "It's would be as if" should be "It would be as if" Sorry about these!