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Darby, Why are there Seasons? [Third in the Isaac and Darby Series]

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This is the third and the most ambitious of the Isaac and Darby series. This book tackles the complicated concept of the earth orbiting the sun. The key concept for seasons, is the tilt of the earth. Darby has Isaac lean into the sun (a soccer ball) to feel the tilt of the earth. Further discussion of this and other books in the series can be found at www.IsaacAndDarby.com.

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Price Summary

  • We started tracking this book on May 7, 2013.
  • This book was $0.99 when we started tracking it.
  • The price of this book has changed 3 times in the past 4,532 days.
  • The current price of this book is $2.99 last checked one day ago.
  • This book is at its lowest price in the past 90 days.
  • This lowest price this book has been offered at in the past six months is $0.99.
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  • The lowest price to date was FREE last reached on May 10, 2013.
  • This book has been FREE one time since we started tracking it.
  • The highest price to date was $2.99 last reached on August 29, 2014.
  • This book has been $2.99 one time since we started tracking it.
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Additional Info

  • Text-to-Speech: Disabled
  • Lending: Disabled
  • Print Length: 50 Pages

We last verified the price of this book about one day ago. At that time, the price was $2.99. This price is subject to change. The price displayed on the Amazon.com website at the time of purchase is the price you will pay for this book. Please confirm the price before making any purchases.