Caver Marcus Thomas and photographer Neil Silverwood laboured over Caves for years, producing a coffee-table behemoth full of the magic of our underground world.

The top of the South Island has some of the globe’s most spectacular caves, but few people will ever realise the extent of their magnificence in person. This will be your chance to cave vicariously with one of New Zealand’s best, in conversation with Potton & Burton publisher Robbie Burton.