keyword

free books

Monthly search volume and cost-per-click data for "free books" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=free+books&country=us" +--------------+------------------+ | volume | 33,100 | | cpc | $4.9 | | competition | 0.21 | | country | US | | updated | 2026-05-21 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
free books online	40,500	$3.83	20/20
book free	33,100	$5.45	20/20
books free	33,100	$5.45	20/20
read books for free	33,100	$3.88	20/20
books free to read	9,900	$2.5	20/20
free books to read	9,900	$3.76	20/20
free online books	9,900	$4.52	20/20
online books free	5,400	$4.5	20/20
books online free	4,400	$3.71	20/20
books to read for free	4,400	$3.49	20/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=free+books&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt