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This book is just the beginning. While working through the exercises in this book on your way to mastering the ZBrush interface and its tools, you should also take the time to explore more using the resources on this list. In addition, ZBrush Character Creation: Advanced Digital Sculpting by Scott Spencer (Sybex, 2008), which is now being written, will pick up where this book leaves off. His book will incorporate a deep level of understanding of the art of digital sculpture and the concepts behind creating great artwork into more advanced ZBrush topics and lessons.