The appendic B is just giving an 404, when followed.
Trade
A full description of the trade pattern is included in the
online version of Appendix B, which you can find at
www.peachpit.com/gamemechanics.
If you visit however the page for the ebook you will find
Register your product to gain access to bonus material or receive a
coupon.
Taken from their support page, there are multiple steps you may need to take to get access to the bonus content
Registering a product for access to bonus content
Some of our products require you to register your purchase to your account on our sites, in order to access bonus content associated with
the product.
- To access bonus content for products you have registered, look for
Access Bonus Content links on the Registered Products tab of your
Account.
- Bonus content does not exist for all titles. And sometimes it
takes a few weeks after a title's publication for the bonus content to
be finalized, submitted, and posted. This is usually author-dependent.
It is posted as soon as it is ready.
- If you purchased a product on the
Peachpit site, that product will automatically be registered to your
account, and you do not need to complete any further steps. Look on
the Registered Products tab of your Account page for any available
Access Bonus Content links.
- If you are registering a product you
purchased elsewhere, you may be asked to answer a proof-of-purchase
"challenge question" in order to verify that you own the correct
product. This may ask about a word related to a numbered element in
the book—for example, "What is the third word in the caption for
Figure 3.1?" Be sure you identify the proper element; in this case it
is Figure 3.1 and not Table 3.1 or Example 3.1. Challenge question
answers are case-sensitive.
- Only ISBNs sellable on the Peachpit site
and other InformIT Network storefronts may be registered to the
Peachpit site and other InformIT Network storefronts. This means that
standalone EPUB eBook ISBNs sold at retail, or Kindle eBook ISBNs sold
on Amazon, will not be recognized by our registration system.
Purchasers of those products should look for a Where are the Companion
Files? page in their eBook, which will provide instructions on exactly
what ISBN to register.