diff --git a/index.html b/index.html
index 32d35190..555926ab 100644
--- a/index.html
+++ b/index.html
@@ -250,25 +250,25 @@ if (window.location.host.endsWith('8bitworkshop.com')) {
     </a>
     <ul class="dropdown-menu dropdown-menu-right" aria-labelledby="booksMenuButton">
       <li>
-        <a class="dropdown-item dropdown-link book-vcs" target="_book_a2600" href="https://www.amazon.com/gp/product/1541021304/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&tag=pzp-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B01N4DSRIZ&linkId=04d39e274c06e6c93b93d20a9a977111">
+        <a class="dropdown-item dropdown-link book-vcs" target="_book_a2600" href="https://www.amazon.com/gp/product/1541021304/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&linkCode=as2&creativeASIN=B01N4DSRIZ">
           <img src="images/book_a2600.png"/>
           &nbsp;&nbsp;<span class="book-title">Making Games For The Atari 2600</span>
         </a>
       </li>
       <li>
-        <a class="dropdown-item dropdown-link book-arcade" target="_book_arcade" href="https://www.amazon.com/gp/product/1545484759/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1545484759&linkCode=as2&tag=pzp-20&linkId=b27709c022d2ebe639e90316d9f4fd5b">
+        <a class="dropdown-item dropdown-link book-arcade" target="_book_arcade" href="https://www.amazon.com/gp/product/1545484759/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1545484759&linkCode=as2">
           <img src="images/book_arcade.png"/>
           &nbsp;&nbsp;<span class="book-title">Making 8-bit Arcade Games in C</span>
         </a>
       </li>
       <li>
-        <a class="dropdown-item dropdown-link book-verilog" target="_book_verilog" href="https://www.amazon.com/gp/product/1728619440/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1728619440&linkCode=as2&tag=pzp-20&linkId=7237a25861cb6b49a4128ba53d84c3e2">
+        <a class="dropdown-item dropdown-link book-verilog" target="_book_verilog" href="https://www.amazon.com/gp/product/1728619440/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1728619440&linkCode=as2">
           <img src="images/book_verilog.png"/>
           &nbsp;&nbsp;<span class="book-title">Designing Video Game Hardware in Verilog</span>
         </a>
       </li>
       <li>
-        <a class="dropdown-item dropdown-link book-nes" target="_book_nes" href="https://www.amazon.com/gp/product/1075952727/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1075952727&linkCode=as2&tag=pzp-20&linkId=633176e8b36fea7f927020e2c322d80a">
+        <a class="dropdown-item dropdown-link book-nes" target="_book_nes" href="https://www.amazon.com/gp/product/1075952727/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1075952727&linkCode=as2">
           <img src="images/book_nes.png"/>
           &nbsp;&nbsp;<span class="book-title">Making Games For The NES</span>
         </a>