http://book.klll.cc/ebooks/subject/13979.opds 2025-08-24T09:38:46Z Books about Critical thinking (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 2025-08-24T09:38:46Z https://book.klll.cc/ebooks/16547.opds Sequential Problem Solving Fredric B. Lozo