Project Ariadne.

On the record

#1 in Free Kindle

During its free promotion, 14–18 October 2026, the Kindle edition reached #1 on three of Amazon's Top 100 Free lists. Amazon's ranks change by the hour, and a free list is not a paid one, so here are the screenshots, with the dates they were taken.

Amazon Best Sellers in Software Development, Top 100 Free: Project Ariadne at #1.
Software Development · Top 100 Free · 15 October 2026, 09:27 Athens time
Amazon Best Sellers in Business Teams, Top 100 Free: Project Ariadne at #1.
Business Teams · Top 100 Free · 15 October 2026, 09:28 Athens time
Amazon Best Sellers in Business Leadership, Top 100 Free: Project Ariadne at #1.
Business Leadership · Top 100 Free · 15 October 2026, 09:28 Athens time
Best Sellers Rank: #173 Free in Kindle Store; #1 in Business Teams, Software Development (Kindle Store) and Business Leadership.
The book's Amazon page the same afternoon, 15:33: #173 Free in the whole Kindle Store.

The promotion is over and the book is back at its paid price.

Get it on Kindle