The meeting materials are compiled into a booklet.
This pamphlet contains detailed information about sightseeing spots.
We compiled the meeting materials into a single booklet.
We made a guide booklet for new students.
They were handing out event booklets in front of the station.
冊子 is the general word for a booklet or bound volume, while 小冊子 specifically emphasizes its small size.
The kanji 冊 means 'volume' or 'counter for books', and 子 is a nominal suffix. The word originally referred to a bound collection of sheets, and its modern usage retains that sense of a small or thin book.