seodata.dev

keyword

the most difficult book to read

Monthly search volume and cost-per-click data for "the most difficult book to read" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=the+most+difficult+book+to+read&country=us" +--------------+------------------+ | volume | 140 | | cpc | $1.19 | | competition | 0.05 | | country | US | | updated | 2026-03-29 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
hardest book to read 2,400 $0.46 20/20
hardest books to read 2,400 $0.36 20/20
hardest novels to read 2,400 $0.46 20/20
most difficult books to read 2,400 $0.46 20/20
the hardest books to read 140 $1.19 14/20
hardest books to read in english 90 $0.02 15/20
hardest book to understand 40 $0 14/20
what are the hardest books to read 40 $0 14/20
what is the hardest book to read in english 40 $0.47 14/20
hardest english book to read 30 $0 15/20

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=the+most+difficult+book+to+read&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