On Good Authority: 7 Steps to Prepare, Promote and Profit From a How-To Book That Makes You the Go-to Expert by Michael E. Gerber

Michael E. Gerber

UK marketplace

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On Good Authority: 7 Steps to Prepare, Promote and Profit From a How-To Book That Makes You the Go-to Expert

By Michael E. Gerber

GBP 0.77 Sale

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Deal History

3

Deals Tracked

3

Sale Months

£3.51

Avg Deal Price

1 week ago

Last on Sale

Lowest deal price seen: £0.77

Price History

Step chart of observed prices. Filled markers are recorded deal appearances; the line tracks the regular-price segments we've confirmed.

Sale price (snapshots) Regular price (snapshots) Recorded deal

Past Deals

June 2026 Sale

£0.77

May 2026 Sale

£8.99

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