Please help me identify this obscure children's book!

Cafe Society
1

I didn’t want to bring up an old thread that was 3 pages long, so please bear with me.

I’m trying to find the name and author of a children’s book that my boyfriend read when he was in grade school. All he can remember about it was that it took place on Krakatoa, before it blew up. He said he thought he remembered something about a secret society.

Can anyone help me? Thank you ever so much.

2

All I found was This.

The twenty one balloons

3

I don’t know, but you could try submitting your query on this site:

http://www.logan.com/loganberry/default.html

4

It’s The 21 Baloons by William Pene Du Bois.