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How well are Game if Thrones books doing?
I gather this was rhetorical, but I did a quick search... not quite as easy, first book "A song of ice and fire" lets you choose between "68 formats and editions"

many of which are not even books. The mass market paperback version is sitting at #1836, but a box set that includes it and 4 other books is at #433.
It's also interesting looking at known bestsellers through this lens. The 2000 printing of the Dragonlance Chronicles are still moving 5-25 books per day (for some reason volumes 1 and 3 of the series move much faster than volume 2) on Amazon alone. That's staying power, I guess.
Though it's a little funky that for the Legends trilogy the second volume sells far better than the first and third.
Interesting stuff.
Considering how low the number of actual sales/day at the higher spots, it is possible that it is just a momentary difference that doesn't affect averages, I agree that it is interesting. That's partially why I liked the original threads, it is much easier to get a picture of a product's success if you know their ranking over time, rather than just at a particular moment.
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No doubt it's doing well. But every dood in charge of D&D @ WOTC over the years (Slav, Rouse, Mearls) has said how awesome the game has sold and twisted some statistic to their advantage. It's their job to promote and tell us everything is better than it has ever been before.
Not that you are, but it would be difficult to present Mearls' statements comparing the sales numbers of the 5e PHB to previous Wotc edition PHBs as twisting statistics to their advantage. They have the numbers, it would be insane for him to lie about them, HUGE downside with really no positive in the current situation. It is theoretically possible that he was incorrect, I suppose, but not likely and the statements were later clarified. I am sure most people at the company know about the statements and would have corrected the if they knew them to be incorrect.
I have been skeptical about the non-mm they are releasing. But, initial sales are strong. CoS strong.
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(And no, not everything they release does this well).
We will see what happens when people actually get their hands on it.
That is interesting, especially considering this is the farthest Wotc has gone to potentially divert sales to FLGs and away from Amazon (AFAIK), with the alternate cover.