What's the Name of That Book??? discussion

This topic is about
Alvin's Swap Shop
SOLVED: Children's/YA
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SOLVED. YA (Children's Chapter) Book Starring Children -- Key Feature: They had a trading economy and a shop where people traded things for other things, even adults in the community traded there. [s]
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Alvin's Swap Shop by Clifford B. Hicks? There are different cover images.
Sounds like a mystery: "While running a swap shop, a group of youngsters become involved in the mystery of a sunken ship."
Here's the description on Worldcat.org: "Alvin the Magnificent Brain opens a swap shop with only one black ant as his stock-in-trade. He expects business to flourish. What he does not expect is to have his shop turned into a hideout for a young fugitive from Scarface, a desperado after sunken treasure."
https://www.worldcat.org/advancedsearch > Keyword: trading shop | 1960-1994 ? | Juvenile | Fiction | Book | English
Sounds like a mystery: "While running a swap shop, a group of youngsters become involved in the mystery of a sunken ship."
Here's the description on Worldcat.org: "Alvin the Magnificent Brain opens a swap shop with only one black ant as his stock-in-trade. He expects business to flourish. What he does not expect is to have his shop turned into a hideout for a young fugitive from Scarface, a desperado after sunken treasure."
https://www.worldcat.org/advancedsearch > Keyword: trading shop | 1960-1994 ? | Juvenile | Fiction | Book | English

THANK YOU!
You're welcome, Jen. Glad you found your book. Google searching didn't seem to help, so I used Worldcat.org which is good for finding old children's books.
Books mentioned in this topic
Alvin's Swap Shop (other topics)One Red Paperclip: Or How an Ordinary Man Achieved His Dream with the Help of a Simple Office Supply (other topics)
As a plot feature there was a child who had a shack where she or he ran a direct-barter trading shop. The children would use this shop. The adults in the community would use this shop. Vague snippets of memory say that there may have been the word "junk" associated with the shop, although the trades always paid off well for the "customer". I recall the author remarking in the book that the shopkeeper child didn't always know why some new bauble had come in to their life, but it always had purpose in terms of another trade made.
I read One Red Paperclip: Or How an Ordinary Man Achieved His Dream with the Help of a Simple Office Supply and it reminded me so much of this book's trading economy that I desire to find the book again. I hope someone else out there can help.