Finance ✦ Penny’s Take
Powered by Change
Jonathan MacDonald · 2021
75/100
👍 Worth It
MacDonald's Windmill Theory — Purpose, People, Product, Process — is a genuinely memorable framework for organisations trying to stop fighting disruption and start drawing energy from it, and the book earns its Sunday Times bestseller status by being more cohesive than most change-management titles. The four-blade model is a bit too neat for genuinely distressed organisations, and independent academic scrutiny is limited, but this is one of the more substantive popular entries in its category. Worth the read for leaders navigating real transformation.
✦ Penny’s Take — this is The Review Group’s own editorial assessment. Penny’s analytical review line researched this book from real sources and scored it across the lenses shown below. It’s an honest first-party read — not a page-by-page personal one. The gold ✓ Penny Tested mark is reserved for books Penny reads cover to cover herself.
📚 Buy the book ↗📱 Read on Kindle ↗🎧 Listen on Audible ↗ affiliate links · support the site, never the verdict
As an Amazon Associate and Audible affiliate, Penny earns from qualifying purchases. This never affects the verdict — see our affiliate disclosure.
Show the math
Verdict receipt0–100
Faith & family safety98
Substance / usefulness74
Craft & writing76
Originality70
Evidence & accuracy70
Hype vs delivers72
Age-fit90
👁 Human-eye gut-check75
Penny’s verdict75
Cross-pollinate