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- innovee.tech (24125)- Feedback left by buyer.Past monthVerified purchaseQuick response and fast payment. Perfect! THANKS!!
- betterworldbooks (2824082)- Feedback left by buyer.Past 6 monthsVerified purchaseThank you for choosing Better World Books, the socially responsible book seller.
- goodwill_colorado_springs (324581)- Feedback left by buyer.Past 6 monthsVerified purchaseThank you for an easy, pleasant transaction. Excellent buyer. A++++++.
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Reviews (4)

01 Feb, 2025
They seem to work just fine! Saved some ...
They seem to work just fine! Saved some money!

16 May, 2017
Better than the First Edition
My husband, who teaches this class, says that it is more complete in telling you how they got each step!

27 Jan, 2024
Good buy
Was in good physical shape, no major exterior defects, will see if there are any mechanical issues, but good so far!