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| SERVICE RESTRICTION |
| The main IAPSOP server is being overrun by unknown crawlers running on IP addresses controlled by Amazon Web Services (AWS), crawlers with IP addresses in the People's Republic of China, and other miscreants, all of which are almost certainly collecting materials to train large language models (LLMs) -- so-called "artificial intelligence." To ensure equitable access, the speed of any one connection to the IAPSOP archive is currently throttled, and the total bandwidth available is also limited. We apologize for the inconvenience. Service will be restored to normal when the pigs leave the trough... which is likely never. Free "AI" costs IAPSOP, and many other organizations, quite a bit. |
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The IAPSOP is a US-based private organization focused on the digital preservation of Spiritualist and occult periodicals published between the Congress of Vienna and the start of the Second World War. Our all-volunteer staff digitizes, indexes and makes available free-of-charge these periodicals, in our archive, for use by students and researchers. We have a standing want list and will respond promptly to inquiries and offers from sellers. We accept contributions of material and labor to further this work. If you want a complete local copy of IAPSOP's holdings, follow these instructions. If you know what you're looking for, hit the archive index directly. If you want to explore a particular area of the occult, start with the lists below, prepared by IAPSOP's directors. If you are interested in practical teachings, browse our Lessons archive.
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| Current Holdings: | 4.45 million pages (2.25M pages of monographs, 2.30M pages of periodicals), +49,000 files, +980 gigabytes of data |
| Latest Milestones: | Q4 2025 Refresh: Significant updates and additions to English, Russian, Spanish and French occult periodicals; significant additions to Kardecian periodicals; reindexing of Tier 1 English Spiritualist periodicals |
| Top 20 Visiting Countries (of 82 total, Prior 90 Days) | US China Singapore United Kingdom Germany Italy Canada Framce Brazil Netherlands Australia Mexico Russia Spain India Argentina South Korea Turkiye Japan Poland |
| 5 Least-Frequently Visiting Countries (of 82 total, Prior 90 Days) | Trinidad # Tobago Turkmenistan Uganda Zimbabwe Burkina Faso |
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