keyword

best selling books

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

$ curl "https://app.seodata.dev/v1/keyword?q=best+selling+books&country=us" +--------------+------------------+ | volume | 22,200 | | cpc | $0.36 | | competition | 1 | | country | US | | updated | 2026-05-29 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
best-selling book	27,100	$0.54	20/20
best selling book	22,200	$0.36	20/20
best seller books	14,800	$0.41	20/20
bestselling books	14,800	$0.41	20/20
best sellers book list	2,900	$0.67	20/20
top selling books	2,900	$0.43	20/20
best seller books list	2,400	$0.4	20/20
list of best seller books	2,400	$0.4	20/20
bestseller books	1,900	$0.41	20/20
best sellers books	1,600	$0.37	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=best+selling+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