keyword

free biology book

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

$ curl "https://api.seodata.dev/v1/keyword?q=free+biology+book&country=us" +--------------+------------------+ | volume | 40 | | cpc | $10.11 | | competition | 0.25 | | country | US | | updated | 2026-06-26 | +--------------+------------------+

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
biology textbook	18,100	$0.9	16/20
biology textbook free	140	$4.46	15/20
free biology textbook	140	$4.46	15/20
free biology textbooks	140	$4.46	15/20
free online biology textbook	70	$7.71	16/20
free online biology textbooks	50	$0	16/20
biology books for free	40	$6.18	17/20
free biology books	40	$10.11	17/20
free books biology	40	$10.11	17/20
biology books free	40	$6.18	16/20

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=free+biology+book&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