P. 223, line 4

The middle matrix should be

$\left[\begin{array}{ccccc}0& 0& 0& 0& 0\\ 0& 1& 1& 0& 0\\ 0& 0& 1& 1& 0\\ 0& 0& 0& 1& 0\end{array}\right]$

Return to errata.