John Osmond calls Preseli – west and north Pembrokeshire – magical country. It is a landscape of bare hills, big skies and a dramatic coastline of bays and headlands. Real Preseli invites the reader to journey with Osmond as he walks the area and its iconic frontier the Landsker, which marks the northernmost extent of the Norman and other settlement. It begins in Solva on the western coast and, skirting the Preseli hills, moves eastwards in an irregular line, its path dotted with frontier castles at towns and villages like Roch, Rudbaxton, Rath, Wiston, and Llawhaden.