keyword

free textbooks online

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

$ curl "https://app.seodata.dev/v1/search-volume?q=free-textbooks-online" +--------------+------------------+ | volume | 4,400 | | cpc | $9.14 | | competition | 0.06 | | country | US | | updated | 2026-03-29 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
online textbook free	14,800	$5.08	18/20
free textbook site	12,100	$9.86	20/20
free textbook websites	12,100	$13.17	20/20
websites for free textbooks	12,100	$9.74	18/20
free textbooks	9,900	$9.57	20/20
textbooks free	9,900	$9.57	20/20
free textbooks pdf	5,400	$11.64	20/20
free online textbooks	4,400	$9.62	20/20
textbooks online free	4,400	$9.62	20/20
where to find free textbooks	2,400	$10.95	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/search-volume?q=free-textbooks-online" 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