If you look up non-English corpus, you can see an effect. Here in Spanish, but also in French and Italian ones. https://books.google.com/ngrams/graph?content=D

If you look up non-English corpus, you can see an effect. Here in Spanish, but also in French and Italian ones. https://books.google.com/ngrams/graph?content=Dan+Simmons%2CJohn+Keats&year_start=1800&year_end=2019&corpus=32&smoothing=0 https://books.google.com/ngrams/graph?content=Dan+Simmons%2C... The effect can obviously be very little in an English corpus. The effect of Dan Simmons' books is mostly to introduce John Keats to casual readers and is even pronounced that these readers have no reason to have been exposed to Keats at school. They (including me) are obviously a low quality public who will not be interested with Keats' work over a long period, just a mere curiosity. They won't write books and won't create a market of books about the poet so I expect ngrams to be a mediocre measurement for this effect. It would be more interesting to look at Keats book yearly sales.