Some of you noticed a few typos on the book. Apologies! They should be fixed now (hopefully), all electronic versions should update at your sync request. If that doesn't happen, send me an email at federicopistono [a_t] gmail.com with the ID of the purchased item and I'll send you the updated copy via email.
If you already purchased a paperback copy and you would like the updated version with the typos fixed, send me an email with a picture of you holding the book and I'll send you a PDF version for free.