diff --git a/game-programmer.dot b/game-programmer.dot
index 47fcc3e..3db8f29 100644
--- a/game-programmer.dot
+++ b/game-programmer.dot
@@ -435,7 +435,7 @@ digraph {
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             gameenginearchitecture2 [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/gameenginearchitecture2.jpg"/></TD></TR><TR><TD>Game Engine<br/>Architecture (GEA)<br/>2nd Ed (2014)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/1466560010/"]
             "3dgameenginearchitecture" [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/3dgameenginearchitecture.jpg"/></TD></TR><TR><TD>3D Game Engine<br/>Architecture<br/>(2004)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/012229064X/"]
-            gameenginedesign2 [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/gameenginedesign2.jpg"/></TD></TR><TR><TD>Game Engine<br/>Design<br/>2nd Ed (2014)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/0122290631/"]
+            gameenginedesign2 [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/gameenginedesign2.jpg"/></TD></TR><TR><TD>3D Game Engine<br/>Design<br/>2nd Ed (2006)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/0122290631/"]
         }
         
         gameenginegems1 [label=<<TABLE BORDER="0" CELLSPACING="0"><TR><TD WIDTH="100" HEIGHT="100" FIXEDSIZE="TRUE"><IMG SCALE="TRUE" SRC="images/gameenginegems1.jpg"/></TD></TR><TR><TD>Game Engine<br/>Gems 1 (2010)</TD></TR></TABLE>> URL="https://www.amazon.com/dp/0763778885/"]