The authors would like to dedicate this book to those who helped us, showed patience, and gave us inspiration:

To Barbara, who gave Bob his first LEGO set in 1974, and to Betsy, who graciously gave Bob the precious time and space to work on the material and to build that amazing cube solver.

To Lael, who loaned us Trevor and his expertise for far too many long hours.

To Takeo, whose 60th birthday celebration made the robot spark our priority.

To Mary Beulah, who during the project would always pronounce the word robots ro-buts, we will miss you.

To Vera Mae, who was the first to ignite Tracey’s passion for philosophy and science, you are missed.

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