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WE'RE BACK!

October 2025 lilbrary presentations return for another season of lively multi-media presentatioins on "ghost hunting" with from a skeptical viewpoint, including high-tech pseudoscience, skeptical inquiry, critical and thinking pitfalls like cognitive biases. Free admission and open to the pubic. Note: Portions of this presentation may not be suitable for very young audiences.

When and where?

Oct. 21, 6-8pm

Kensington Branch Library

4121 Adams Ave, San Diego, CA 92116

Oct. 28, 5:30-7:30pm

Paradise Hills Branch Library

5922 Rancho Hills Dr, San Diego, CA 92139

honoring the heroes of

skeptical inquiry

Infrared (IR) Illumination: Digital video and still shot cameras used by PPI investigators are equipped with an ability to "see" in the dark using infrared light. This feature is indispensable since virtually all investigations take place in the cover of darkness. Anomalies such as shadows and moving objects that would otherwise be unseen by the naked eye are more likely to be detected in infrared. Images and video recorded with infrared sometimes seem like they are black-and-white; this is a false color impression.

click for team bios

Frank's Spirit Box

Guest writer Dan Scott, an amateur ham radio operator and founder of SanDiegoHaunted.com, offers an informed and practical review of the controversial Frank's Spirit Box.

Interview with Karl Sherlock

PPI President and Co-Director Karl Sherlock gave this interview for a journalism student at Grossmont College who was interested in paranormal investigation. The interview took place in April 2013.

ppi live

'jaded light' award

skeptical inquiry

the daily datum

team ppi welcomes you

sample our readings

Frank's Spirit Box

browse our media library

Interview with Karl Sherlock

subject index

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