You can download and read the first and second chapters of the $21 Challenge book here:
First chapter
Second chapter
To give you an idea of what is in the book here are sample pages from each chapter:
Sample pages
21DollarChallenge-Chapter-One.pdf - 1M
21DollarChallenge-Chapter-Two.pdf - 479K
21DollarChallenge-Sample-Pages.pdf - 575K
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