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David J. Perdue is the author of the bestselling NXT book, The Unofficial LEGO MINDSTORMS NXT Inventor’s Guide (No Starch Press). He is also the author of Competitive MINDSTORMS (Apress) and has written for BrickJournal. He has been inventing with MINDSTORMS since 2001 and has received three Special Mention awards for his creations on the official online MINDSTORMS invention gallery. He lives with his family in Round Rock, Texas, and maintains his website at www.davidjperdue.com.