'The Pieces of the Puzzle' was #1 Fiction for 4 weeks, Top 10 Mystery for 11 weeks and Top 20 Mystery for 16 weeks at Audible.com.
'The Kingdoms and the Elves of the Reaches' was #1 in Fiction at Audible and soon #1 on the entire site and not long after one of the Top 100 grossing titles in Audible’s history.
It's important to point out that if a list includes publisher reported numbers, as many lists did and some continue to do, the honor system was/is relied upon. The publisher reported numbers were/are simply relied upon as fact--something that some publishers took advantage of by shipping out huge numbers of books at steep discounts and than calling the books "sold."
Additionally, as cool as it can be for an author to see their free giveaway soar up the Amazon free list and maybe get to #1 Free in a category or even #1 Free on the entire site, a book given away isn't a bestseller. During my giveaways at Amazon every one of the books I had in KDP Select landed at #1 in a top-level category at some point in time. I gave away over 250,000 books and I don't count any of it as anything. Why? I gave the books away for free. Readers weren't purchasing them. Reaching #1 Free multiple times was fun but ultimately meaningless (and I do of course, as always, reserve the right to change my opinion about this).
If you're an author and you disagree with my thoughts on free, and that's your choice to do so, I hope you'll always qualify in any reference that your book was being given away at the time. You can use the same qualifiers I discussed earlier with regard to website, category and position within category. For example:
A #1 Free Mystery at Amazon
Further, true bestsellers stay on print bestseller lists not for a single week but for multiple weeks. True bestsellers stay on online bestseller lists not for a few hours on a particular day or for a particular day but for many days. Here's an example:
'The Kingdoms and the Elves of the Reaches was #1 on Audible for FOURTEEN consecutive weeks and then a Kids & YA Top 10 bestseller for the next THREE YEARS.
Now that's bestselling power and it was reflected in the massive sales and millions in retail earnings for my books at Audible.