Update book purchase links in promo.html

Author: aarongustafson

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   <div class="promo__copy">Like this? You might dig my book
     <a href="https://adaptivewebdesign.info/2nd-edition/"><cite>Adaptive Web Design, Second Edition</cite></a>. You can grab a copy on 
     <a href="https://www.amazon.com/gp/product/0134216148/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=0134216148&amp;linkCode=as2&amp;tag=easydesign-20&amp;linkId=7EDENIS3P4XL7LIT">Amazon</a>,
-    <a href="https://www.barnesandnoble.com/w/adaptive-web-design-aaron-gustafson/1102101792">Barnes &amp; Noble</a>,
-    <a href="https://www.peachpit.com/store/adaptive-web-design-crafting-rich-experiences-with-9780134216140">Peachpit</a>, or anywhere excellent web design books are&nbsp;sold.
+    <a href="https://www.oreilly.com/library/view/adaptive-web-design/9780134216287/">O’Reilly</a>,
+    <a href="https://www.alibris.com/Adaptive-Web-Design-Crafting-Rich-Experiences-with-Progressive-Enhancement-Aaron-Gustafson/book/26961397">Alibris</a>, or anywhere excellent web design books are&nbsp;sold.
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