There's a lesson in marketing here but I'm not sure what it is. "Meow: a novel"

The only actual word in this book is "meow" 

Hundreds of pages. Tens of thousands of meows.

And it is selling. 1K+ bought or read in past month.

Best Sellers Rank:
#1,055 in Books (See Top 100 in Books)
#1 in Cat Care
#2 in Puns & Wordplay
#2 in Cat, Dog & Animal Humor

73 ratings 4.5 on Goodreads 209 ratings

https://www.amazon.com/Meow-Library-Sam-Austen/dp/B0C9VSQ914