I note, from reading the Wikipedia article on Mr. Piper, that both this book and "Space Viking" are part of a series called the "Federation" series. I think I'll do an omnibus edition of the complete series - that would make it easier to read the books in the right order.
The books in the series are:
1. Uller Uprising
2. Four-Day Planet
3. Lone-Star Planet
4. The Cosmic Computer
5. Space Viking
I'll try and get that done tomorrow. I'll leave these books here in case anyone prefers to download them separately.
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