The top 10 neighbors for Harper Books span a narrow similarity band — from 0.95 down to 0.90 — with no single dominant match and no clear runaway cluster. What stands out is the composition: fellow book publishers share space with government officials, politicians, a blog, and a magazine, all at nearly identical scores.

The shape is flat. Harper Perennial leads at 0.95, followed closely by Chuck Schumer at 0.92 — a Government Officials subcategory entry sitting just above W. W. Norton & Company (0.92) and Penguin Books USA (0.92). Kirsten Gillibrand (0.91, Politicians) and Food52 (0.91, Blogs) follow, with The Nation (0.91, Magazines), NY AG James (0.90, Government), Penguin Random House (0.90, Book Publishers), and Brennan Center (0.90, Non-Profit) rounding out the ten.

Tallying subcategories: four of the ten neighbors are Book Publishers, three are political or government figures (Government Officials, Politicians, Government), and the remaining three are a Blog, a Magazine, and a Non-Profit. This is a cross-kind cluster — the audience shape Harper Books shares with peer publishers is nearly indistinguishable from the shape it shares with progressive political and civic entities. No entertainment, retail, or sports subcategories appear in the top 10.

The flat distribution across these mixed subcategories suggests an audience defined less by a single content type and more by a consistent civic-literary orientation that cuts across publishing, politics, and media.