"Prehistoric Sites of Montgomeryshire" - Beth McCormack (2006 Logaston Press).

Volume XI in Logaston's excellent "Monuments in the Landscape" series.

Includes detailed background chapters on Stone, Bronze and Iron Age in Montgomeryshire and surrounding areas. Details of over 30 principle sites, with access details, some plans and photos. 163pp.

A number of the earlier volumes in the series are out of print, but they are well worth seeking out.

"Prehistoric Sites of Herefordshire" - George Children and George Nash (1994 Logaston Press).

The first volume in Logaston's "Monuments in the Landscape" series.

Similar to the other volumes mentioned above. 133pp, B&W illustrated throughout.

"Prehistoric Sites of Monmouthshire" - George Children and George Nash (1996 Logaston).

Volume 4 in the "Monuments in the Landscape" series (Vols 2 and 3 concerned medieval sites). 128pp, B&W illustrated throughout.

"Neolithic Sites of Cardiganshire, Camarthenshire and Pembrokeshire" - George Children and George Nash (Logaston Press).

Volume V in the "Monuments in the Landscape" series. I don't have this one, so can't tell you what it covers or how many page, etc. It strays away from the previous volumes by covering a much briefer time-span.

George Nash (Logaston Press 2006).

Detailed look at pretty much all the extant chambered tombs of Wales.

100 separate monuments are covered, with B&W pictures and/or plans of most. 256 pp, soft cover.