keyword

best free online textbook sites

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

$ curl "https://api.seodata.dev/v1/keyword?q=best+free+online+textbook+sites&country=us" +--------------+------------------+ | volume | 30 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-06-08 | +--------------+------------------+

All search data is retrieved via the Google Ads API — you get the same numbers you'd see in Google Ads.

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
textbook websites free	40	$11.88	10/20
how to find any textbook online for free	20	$0	12/20
free university textbooks pdf	20	$0	11/20
free ebook textbooks online	20	$4.45	10/20
free uni textbooks pdf	20	$0	10/20
where can i get my textbooks for free	20	$0	10/20
best websites to download textbooks for free	20	$0	9/20
free university books online	20	$0	9/20
how to download textbooks for free pdf	20	$0	9/20
where to get pdf textbooks for free	10	$0	10/20

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://api.seodata.dev/v1/keyword?q=best+free+online+textbook+sites&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 500/month, $4.99/mo unlimited

Full API spec: llms.txt