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Jack Challis
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Jack Challis

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Jack’s favorite books

Isaac's Storm by Erik Larson Wit by Margaret Edson Freakonomics by Steven D. Levitt Getting Things Done by David Allen Girls Think of Everything by Catherine Thimmesh The Design of Everyday Things by Donald A. Norman Envisioning Information by Edward R. Tufte Visual Explanations by Edward R. Tufte The Cuckoo's Egg by Clifford Stoll Seeing Like a State by James C. Scott Yosemite and the High Sierra by Ansel Adams
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Hawaii
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Aug 07, 2026 10:53PM
Energy and Civili...
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Jul 11, 2026 09:58PM
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Jack’s Notes & Highlights

Book cover for The Housekeeper and the Professor
The Housekeeper and the Professor by Yōko Ogawa
2 notes
Jack Challis
There are 5,761,455 primes below 100,000,000. So the housekeeper's phone number is (576) 1455.
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