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This first turns up in Book 4. Come back when you get there.

object

Poison foam

Names:

First appears in Book 4: The Adversary, chapter 7 (6)

Appearances

B1

B2

B3

B4

What you know

Book 4: The Adversary

Ch 7The foam is polyurethane broken down and rebuilt to release hydrogen cyanide; it is fatal to humans and badly harms unshielded Tanu.

An unofficial, spoiler-aware fan guide to Saga of Pliocene Exile by Julian May. Nothing past your reading progress is shown. Book details and covers from Open Library.

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