Your book contains about 2 million characters (letters, spaces, and punctuation marks). If you could type with the accuracy with which the prokaryote E. coli incorporates, proofreads, and repairs bases in replication (about one uncorrected error in 10⁹ to 10¹⁰ bases), how many such books would you have to type before an uncorrected error is “permitted”? (Assume that the error rate is one in 10¹⁰ bases.)