Data catalog, not an instruction skill: 41 horror and gothic books from Project Gutenberg, each with title, author, Gutenberg number, download count and an EPUB address that answered on 2026-10-28. Rights are the United States only. Use when an agent needs public domain horror books, free gothic ebooks or classic ghost stories with links already checked.
Public-Domain Horror Books: 41 With Checked Links is a tested SKILL.md that data catalog, not an instruction skill: 41 horror and gothic books from Project Gutenberg, each with title, author, Gutenberg number, download count and an EPUB address that answered on 2026-10-28; an agent buys it once for $0.10 over x402.
Book texts: this file lists addresses, it does not contain a single chapter. Not a legal opinion: rights are the United States only, and another country may protect the same work. Not a recommendation list, since rank is downloads. No audio books, no paper editions, no books after about 1930.
Tested 2026-10-28 with a strong and a weak model.
Our own test text, before and after the skill ran. Excerpts only.
Before
Which book is number 1 in the catalog?
After
Number 1 is **Frankenstein; or, The modern Prometheus** by Mary Wollstonecraft Shelley (Gutenberg #84, 182,729 downloads). EPUB: https://www.gutenberg.org/ebooks/84.epub3.images The link answered with an EPUB file on 2026-10-28. Rights are public domain in the United States only.
English. Tried in: English.
Perpetual, non-exclusive; use and modify for yourself incl. paid work; no resale or republishing. Holder: Georgi Kalchev, aiskills402.com. Full terms.
Current version 1.0.0, updated 2026-10-28. Whoever bought an earlier version gets new ones free through the same re-download token.
v1.0.0 · 2026-10-28
First release: 41 horror and gothic books with title, author, Gutenberg number, download count and EPUB address. All 41 addresses answered with an EPUB archive on 2026-10-28. Rights are the United States only. Rank is the download count of Project Gutenberg's public API read on 27 and 28 October 2026. Numbers 1 to 18 are a hand-made selection; the rest come from the shelf. Price: $0.10; the value is the checking and the ordering, not the books.
Only 41 works on Project Gutenberg passed all three tests: found, labelled copyright-free under US law, and a working EPUB address. The other catalogues stop at fifty; this one stops where the supply stops, instead of padding with books that are not horror.
18 of the 41 come from the owner's own list, among them Frankenstein, and the rest from the horror and gothic shelves, ordered by downloads. Two works by Kafka were dropped because Project Gutenberg flags their translations as protected.
They are the counts Project Gutenberg's public API reported on 27 and 28 October 2026. Treat them as a rough popularity signal; a title added recently has had less time to collect downloads.
Formatting varies by edition. Project Gutenberg builds its EPUB files from transcribed text, so long dashes, footnotes and archaic spellings appear as the transcribers typed them.
Data & Analysis
Data catalog, not an instruction skill: 50 romance novels from Project Gutenberg, each with title, author, Gutenberg number, download count and an EPUB address that answered on 2026-10-28. Rights are the United States only. Use when an agent needs public domain romance books, free romance ebooks or classic love stories with links already checked.
Data & Analysis
Data catalog, not an instruction skill: 50 science fiction books from Project Gutenberg, each with title, author, Gutenberg number, download count and an EPUB address that answered on 2026-10-28. Rights are the United States only. Use when an agent needs public domain science fiction, free sci-fi ebooks or classic space adventure books with links already checked.
Data & Analysis
Data catalog, not an instruction skill: 50 adventure books from Project Gutenberg, each with title, author, Gutenberg number, download count and an EPUB address that answered on 2026-10-28. Rights are the United States only. Use when an agent needs public domain adventure books, free adventure ebooks or classic sea and jungle stories with links already checked.
Data & Analysis
Data catalog, not an instruction skill: 50 crime and detective books from Project Gutenberg, each with title, author, Gutenberg number, download count and an EPUB address that answered on 2026-10-28. Rights are the United States only. Use when an agent needs public domain detective books, free mystery ebooks or classic crime novels with links already checked.
Data & Analysis
Checks ONE Google Analytics 4 tracking plan (events, their parameters, and the custom dimensions to register with their scope) against the published collection limits and naming rules, and lists only the breaches, one line each with a fixed code, the item, the rule it breaks and the fix - or exactly No findings. It catches an event or parameter name longer than allowed, more parameters on one event than GA4 collects, a reserved event name or a reserved parameter name or prefix, a name that breaks the format rules, and a custom dimension whose values are nearly unique. It leaves out names that sit exactly on a limit and events that use exactly the allowed number of parameters. Use before a plan goes to developers or to Google Tag Manager, to audit a plan that someone else wrote, or to find out why an event or a parameter never shows up in reports.
Data & Analysis
Checks the written readout of ONE A/B test (a paragraph, an email, a table or a slide transcript) for the five statistical mistakes that turn a no-effect test into a "win", and lists only those, one line each with a fixed code, the place, the evidence with the arithmetic and the fix - or exactly No findings. It catches stopping the moment a result looks significant, many metrics or variants judged without correction, a split of users that differs from the planned split by more than chance allows (the sample ratio check, calculated step by step), a sample too small for the effect the team wants to detect, and a relative lift reported without the absolute numbers behind it. It leaves out the safe look-alikes, such as a pre-registered single primary metric, guardrail metrics that only monitor, and a split of 50.2 to 49.8 on a small sample. Use before a test result is shipped, when an analyst or an agent writes a readout, or to review a result someone else announced.