Troutmark Books

Troutmark Books is a large independent second-hand bookshop in Castle Arcade, right in the heart of Cardiff city centre. Dogs are welcome inside across all three floors, so you can browse together without splitting up or leaving anyone tied outside in the arcade.

The shop is packed with books and the layout is snug, so most visitors keep their dogs on a close lead and well-supervised as they navigate the shelves. It's a proper browser's paradise, with the kind of stock that rewards a slow, meandering hunt through the stacks.

Castle Arcade itself sits among Cardiff's main indoor shopping arcades, making Troutmark a brilliant stop on a city-centre dog day. You'll find city-centre parking nearby, though the shop doesn't have dedicated parking of its own. That clear dog access keeps the browse part of the same outing rather than ending in another doorway handover.