The quality of having the status of bestseller.(noun)
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Use "bestsellerdom" in a sentence
"The reason why I wanted to write about AMS is that we all know that big-box retailer sales play such a prominent role now in bestsellerdom."
"So with little hope of ascending the peaks of bestsellerdom, where the question of "why" has answers in abundance, I'm left with my book and my question."
"Phil's pissed with my slow ascent to bestsellerdom."