The European Triode Festival is a meeting of vacuum tube enthusiasts that was held roughly yearly in the first part of this century.
I saw a book advertised with that title, which I assumed would cover the amplifiers that were exhibited there.
Today it arrived from Germany: F P Miller, A F Vandome, J McBrewster (eds) European Triode Festival Alphascript Publishing 2010 ISBN 978-613-0-77464-6.
This is worse than an AI-generated publication. The publisher fed keywords into a search of Wikipedia and excerpted the articles.
1.5 pages on the actual festival.
Followed by (among other topics)
6 pages on "valve amplifiers"
3 pages on "triode
20 pages on "vacuum tube"
6 pages on "audiophile"
Then the best part: over that period, the festival was held in Aarhus (Denmark), Finland, and Langerargen (Germany).
Therefore, we get the Wikipedia articles about
35 pages on Finland
11 pages on Aarhus
29 pages on Denmark
2 pages on Langerargen
They left out articles about the locations in the Netherlands.
Avoid the publisher "Alphascript"!
After being burned through the German bookdealer BuchWeltWeit, I found that Alphascript and Betascript (same company) are infamous for this practice.