Errata
If you find any mistakes or typos in the book not listed here, please
tell the author: bill.roscoe (at) comlab.ox.ac.uk.

No matter how hard you try to eliminate mistakes, there always seem to be some left.  Here is a pdf file, in order in the book, of the
errata I know about that are either mistakes or potentially confusing.  Here is a similar file containing minor typos.