http://book.klll.cc/ebooks/author/36912.opds 2025-08-09T02:41:36Z Books by Perry, John (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-09T02:41:36Z https://en.wikipedia.org/wiki/John_Perry_(engineer) See also: en.wikipedia 2025-08-09T02:41:36Z https://book.klll.cc/ebooks/34268.opds Spinning Tops John Perry