**Corrections to***scl*- Below is a cumulative list of corrections for the first printing of the book. Page numbers etc. refer to the printed version. Last change November 24, 2009.
- Preface, pages viii-ix: bullet points should not start with a capital letter. (8/3/2009)
- Chapter 2, page 15, example 2.9: change the second term of the first commutator on the right hand side of the inline equation to b^{-1}aba^{-2}. (6/11/09)
- Chapter 2, page 16, last line of proof of Proposition 2.10: change -2\chi^-(S'')+1 to -\chi^-(S'')/2 + 1. (11/2/09)
- Chapter 2, page 18, line -4: change "Sine" to "Since". (11/2/09)
- Chapter 2, page 42, proof of Proposition 2.88: change the two occurrences of K_n on line 14 to K^n, and remove extraneous commas. (8/3/2009)
- Chapter 2, page 49, statement of Corollary 2.109: change \phi to \rho. (11/2/09)
- Chapter 3, page 56, line -1: change D_\thin to DS_\thin. (8/14/2009)
- Chapter 4, page 115, line -7: change 3 occurrences of g_2(g) to g_2(p) in definition of e(g_1,g_2). (11/24/2009)
- Chapter 4, page 117, line 21: change 4\pi \area(\Gamma) = \scl(C) to \area(\Gamma) = 4\pi \scl(C). (10/16/2009)
- Chapter 6, page 163, line 6: change "Conversely, bicombable function satisfying certain natural conditions are shown to be quasimorphisms" to "Conversely we show that bicombable functions satisfying certain natural conditions are quasimorphisms". (8/3/2009)