http://book.klll.cc/ebooks/subject/17663.opds 2025-08-05T12:55:32Z Books about Tipping (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 2025-08-05T12:55:32Z https://book.klll.cc/ebooks/33170.opds The Itching Palm: A Study of the Habit of Tipping in America William R. Scott