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Why Every Author Should Try BookBub Ads

A cost-effective way to reach 15 million readers and grow your audience

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Writem
Aug 27, 2025
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BookBub has become one of the most compelling marketing platforms for authors looking to reach readers. The engaged user base, flexible budgeting, and a performance-based model make it an attractive yet under-utilised alternative to broader platforms such as Facebook or Amazon.

A vast, book loving audience

BookBub serves around 15 million users worldwide. And these subscribers are all readers who sign up specifically to discover new books and deals. Which means that, unlike Facebook and (to a degree) Amazon my ads are put in front of an audience already primed to explore and purchase.

Test ads on a shoestring budget

One of the aspects I really like about BookBub is I’m able to run campaigns with extremely modest budgets, even as low as $1 per day, meaning it’s easy to undertake low cost experiments, testing targeting, creative, and bids before committing more funds.

Typically, I tend to start at $5, just in case it’s a compelling ad, and increase budget steadily when something works, such as this ad:

Spend only when ads perform

BookBub employs an auction system. The process is to set both a daily (or total campaign) budget plus a maximum bid. There’s also no option to overspend, like on Facebook and Amazon, which means I’m never charged more than expected (so no nasty overnight shocks!).

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