Peadar Ó Cualáin
Cosúil leis an ngruagach féin, is duine an-rúnda an scríbhneoir. I gcathair Chorcaí a tógadh é, agus is i seansráideanna na cathrach sin atá a chroí i gcónaí.
Is faoi Mhártan, buachaill aonarach atá ina chónaí lena Mhama ar Shráid an Iarla, atá na trí leabhar sa tsraith. Buachaill beag fiosrach é Mártan, agus is minic go bhfeiceann sé agus go gcloiseann sé rudaí nach mbaineann dó - rudaí a bhaineann le saol na ndaoine fásta. Is minic, freisin, é i dtrioblóid mar gheall air seo.
Úrscéalta lán le mistéir na seansráideanna agus le draíocht na hóige atá sa tsraith 'Sráid an Iarla', agus iad scríofa i nGaeilge bhreá shimplí an Iarthair, feilúnach do léitheoirí os cionn naoi mbliana d'aois.
The Lorgaire, and Big Mac Giolla ar two very different people. Although the Lorgaire is a little fellow, according to himself he is a big detective - someone who detects big things. As for Big Mac Giolla, the Lorgaire thinks he would make a fine assistant - he could break a lock for him, carry big bags, or even frighten away rogues.
Mártan befriends a freckled-faced girl who brings him to see a mysterious blacksmith in his smithy, and introduces him to a beautiful red-haired singer. But what troubles are Red-Haired Woman and her daughter running from? And who is the Blacksmith whose smithy is hidden behind the garage?
As dogs are being stolen from all over town, a big dark-haired man (known to Mártan as the 'Ogre') and a youthful blonde lady come to live in Number 2, Little Gate Street. When a neighbour's dog disappears Mártan becomes even more curious about the new neighbours. But who is the Ogre? And who is stealing the dogs?
On a winter's evening as Mártan is returning home from school he sees a big ram in the middle of town. Following the ram, comes upon the Professor's garden, and hears the sweet sounds of whistle-playing. But whose ram is it? And what brings it to the Professor's garden? And who is the poor musician who is looking for his tin whistle?