It sounds like you're referring to the phrase (which may be a transliteration of the Arabic ثميل كتاب or a misspelling of تحميل كتاب — “download book”) and specifically looking for the PDF of "The Intensivist" — likely a medical reference book or guide related to intensive care, critical care medicine, or anesthesiology.
You legally purchase the Kindle or EPUB version. Here is how to create a personal PDF backup: thmyl ktab the intensivist pdf