Got it Shel, it's a South African book called Beyond the light barrier by Elizabeth Klarer. I got a copy so I expect it's possible to get more, and as well as a picture of an alien (very normal looking) fern, there are a few crystals and a ring, which, though they look quite normal, are the only pictures I've seen of 'stuff' supposed to be from an alien source. But I have no way of knowing if Ms Klarer, herself a scientist, did the right thing and got these tested. If not, I'd put it firmly in the 'entertaining but forget it' file, along with 99% of similar claims I've followed up.
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Does the brain create or receive consciousness?