When thirteen-year-old geek-girl Charley Morton decides to build what she believes is Leonardo da Vinci's design for a time machine for the middle school science fair, she has two thoughts in mind: to... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest
everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We
deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15.
ThriftBooks.com. Read more. Spend less.