20 AI answers to 5 prompts name 9 brands. Amazon leads with 22.5% of mentions; the top 3 hold 58.4%.
1 index · size = AI answers · colour = top-3 brand share
Brands and sources in the sampled answers
Share of brand mentions in Retail Books and Printed News answers
Moderately concentrated: the top 3 hold 58.4% of mentions; the leader 22.5%.
Every engine sampled
