Author: Sian Eirian Rees Davies.

Series: Cyfres Swigod.

Granny gives the impression that she is confused and has lost her memory. But she is one of Wales's secret detectives - grandmothers who solve some of Wales's worst crimes. Gwyn runs Trem-y-M»r hotel with his mother, and who would have thought that a scoundrel is staying at the hotel.

Awdur: Sian Eirian Rees Davies.

Cyfres: Cyfres Swigod.

Yr argraff mae Nain yn ei roi i bawb yw ei bod wedi drysu a cholli'i chof. Ond mae hi'n un o dîm Ditectifs Cudd Cymru - neiniau sy'n datrys troseddau gwaethaf Cymru. Rhedeg gwesty Trem-y-M»r wna Gwyn a'i fam a pwy feddyliai fod dihiryn yn aros yn y gwesty.