How Many States of Matter are There? 3, 4 or 5?

[Koffing]

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I loved Dragon’s Egg - read it over n over too. It had a few problems, mainly in not going alien enough with such a wild environment, but a fun use of physics!
Similar problems with Timemaster and Rocheworld. Clever ideas, but rather pulpy. Especially Timemaster.
Since we seem to be collecting cool physics/worlds, have you ever read the Smoke [might not be right name] series? (white dwarf at center of bubble of human breathable atmosphere)
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The books you’re referencing are The Integral Trees and The Smoke Ring by Larry Niven, one of my favorite authors.