Sanders Filippine Groot puzzle book

Sanders is a well-established Dutch brand specializing in puzzle magazines and books, particularly known for its diverse range of word and logic puzzles. The brand originated in the Netherlands and was originally created by Sanders PuzzelMedia. It is widely recognized for its 'Filippine' series, which are popular word-based puzzles involving coded grids. Today, the brand is owned by Keesing Media Group, a major European player in the puzzle market headquartered in Amsterdam. The production and printing of these books are primarily handled within the Netherlands to serve the local Dutch-speaking market.