OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Troeon : llyfr erchwyn gwely : myfyrdod ar gyfer bob dydd o'r flwyddyn by Aled Lewis Evans. ISBN 1859941311. Published by Cyhoeddiadau'r Gair in 1998. Publication and catalogue information, links to buy online and reader comments.
