'Dyw e ddim yn llyr storiel (=historical?) iawn ond mae "The Owl Service" gan Alan Garner yn cael ei le yn Nghymru Gogledd. No I can't manage any more Welsh (and I don't know if what I've written so far makes sense). The Owl Service is modern, but draws on 'Math uab Mathonwy' (y pedwaredd canc a mabinogi) in a way that crosses time. Highly recommended. Colin Fine