Pentangle (puzzle supplier)

It operated from premises in Over Wallop in rural Hampshire, England, originally with seven employees including Cook's wife, daughter and son.

[1] It was registered as a company in 1971, by Cook and his business partner James Dalgety,[1][2] with the name Paradox Engineering Ltd. to avoid infringing the rights of the band Pentangle.

In 1976, a wooden puzzle designed by Pentangle for the World Wildlife Fund to offer in its catalogue was expected to sell no more than 3000 copies.

[2] In 1996 the Pentangle range included more than 40 lines, and the workshop in Over Wallop was producing 3000 puzzles a week, half of which were exported from the UK.

[1] Cook developed a sideline in producing branded puzzles for large companies to give as Christmas gifts.