Thanks to those readers who emailed or snail-mailed us some of the following errata. In particular, we'd like to thank Joachim Neubeuser and Helmut Meyn.

• Page 56, line -11: "Cancellation" is misspelled.
• Page 57, line 8: "Cancellation" is misspelled.
• Page 81, line 15: "Cancellation" is misspelled.
• Page 97: In Definition 2.6.5, both x^{d-1} and a^{d-1} should be x^{q^d-1} and a^{q^d-1}, resp.
• Page 106: "Buchburger" should read "Buchberger".
• Page 296: The addresses have changed for emails to GAP's Forum and support lists. See http://mail.gap-system.org/mailman/listinfo/forum for joining the GAP Forum email list (in order to block spam from the list, you now must be a Forum member to send email to the list) and email support@gap-system.org for support questions and/or bug reports..
• Page 297, line -10: "MAGMA" should read "GAP".
• Page 303: There is also a MAGMA users group email list: magma-users@list.cr.yp.to (it is very low volume and also spam-free).
• Page 320: "Buchburger" should read "Buchberger".
• Page 322: Under the reference [MKS], it's "Karras" not "Karrus".
• Page 325: "Buchburger" should read "Buchberger".