RUHSAM, M. 2005. Coryphantha. R.F. Dicht & A.D. Lüthy. Berlin, Heidelberg: Springer-Verlag. 2005. 200pp, colour plates, drawings, maps. ISBN 3 540 22306 1. £61.50 (hardback). Edinburgh Journal of Botany. 61, 2-3 (Aug. 2005), 201–202. DOI:https://doi.org/10.1017/S0960428605290273.