Teitl o'r clawr = Title from cover. 'Dylunydd: Rhodri Hughes' - tu fewn y clawr blaen = Inside front cover.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Edi Esgus. Published by Athrawon Bro in 2008. Publication and catalogue information, links to buy online and reader comments.