keyword

free textbooks online pdf

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

$ curl "https://app.seodata.dev/v1/search-volume?q=free-textbooks-online-pdf" +--------------+------------------+ | volume | 1,600 | | cpc | $4.37 | | competition | 0.16 | | country | US | | updated | 2026-03-30 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
online textbook free	14,800	$5.08	20/20
free textbook site	12,100	$9.86	20/20
free textbook websites	12,100	$13.17	20/20
free textbooks pdf	5,400	$11.64	20/20
free online textbooks	4,400	$9.62	20/20
free pdf textbooks	4,400	$9.4	20/20
free textbooks online	4,400	$9.14	20/20
textbooks online free	4,400	$9.62	20/20
textbook pdf	2,400	$6.49	20/20
textbooks pdf	2,400	$6.49	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/search-volume?q=free-textbooks-online-pdf" 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