What's the Name of That Book??? discussion
SOLVED: Children's/YA
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SOLVED. Children's book set on Hawaii; mystery; at one point they run through lava tube escaping new flow. [s]
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Kate, do any of the seven titles in this www.Worldcat.org search sound familiar?
Keyword: mystery hawaii, Year: 1950-1975?, Juvenile, Fiction, Book, English
Keyword: mystery hawaii, Year: 1950-1975?, Juvenile, Fiction, Book, English

It's on openlibrary.org, free to borrow and read the ebook, which is just a scan of a library book.
Following up on bookel's suggestion of "Volcano Trap", Worldcat.org lists these subjects:
Detective and mystery stories.
Hawaii -- Fiction.
Detective and mystery stories.
Hawaii -- Fiction.
Thank you Kris and bookel!
This could be the book. The plot summary below hits some of memory, although I don't recall some plot elements.
The book is not on goodreads. I'm pasting the Kirkus Review plot summary below. This could be posted as Probably Solved.
KIRKUS REVIEW
Though the sixteen-year-old Hohu twins are older than Dorothy and Frank Warren and their friend Pug, they eagerly look forward to showing their friends from Philadelphia their native island of Hawaii. Kam Hohu is particularly anxious to show the mainlanders the volcanic areas of the island, and though they are trapped within a crater, imprisoned by three whimsical Japanese soldiers who, ten years after the armistice, believe that the war is still on, and nearly obliterated by the furious eruptions of Mauna Loa, the five children not only thoroughly relish their ordeal, but help to vindicate a Chinese ranch hand who has been unjustly accused of cattle stealing. There is humor, adventure and interesting geographic detail in this lively tour of the Hawaiian Islands.
This could be the book. The plot summary below hits some of memory, although I don't recall some plot elements.
The book is not on goodreads. I'm pasting the Kirkus Review plot summary below. This could be posted as Probably Solved.
KIRKUS REVIEW
Though the sixteen-year-old Hohu twins are older than Dorothy and Frank Warren and their friend Pug, they eagerly look forward to showing their friends from Philadelphia their native island of Hawaii. Kam Hohu is particularly anxious to show the mainlanders the volcanic areas of the island, and though they are trapped within a crater, imprisoned by three whimsical Japanese soldiers who, ten years after the armistice, believe that the war is still on, and nearly obliterated by the furious eruptions of Mauna Loa, the five children not only thoroughly relish their ordeal, but help to vindicate a Chinese ranch hand who has been unjustly accused of cattle stealing. There is humor, adventure and interesting geographic detail in this lively tour of the Hawaiian Islands.

https://www.goodreads.com/book/show/3...
Added. It usually takes a few minutes or longer to be searchable in the database. At that point add book/author can be used.
Added. It usually takes a few minutes or longer to be searchable in the database. At that point add book/author can be used.
It is a mystery set in Hawaii. The most vivid scene I can recall is the main characters are in a lava tube (cave) where evidence is found. They need to leave quickly because there is another lava flow coming down the tube. A bit unrealistic, I know, since molten lava in a lava tube tends to flow VERY quickly. But I was a kid.