The Fortified House in Scotland is a five-volume book by the Scottish author Nigel Tranter. Written between 1962 and 1970, it covers almost seven hundred buildings in Scotland which fall under the general description of "fortalices, lesser castles, peel towers, keeps and defensible lairds' houses". As such castles are included (although not the largest examples like Edinburgh or Stirling castles), as well as many smaller, semi-ruinous tower houses. Tranter illustrated each one with pen and ink sketches.