sentences:  Greive subsequently worked across several creative fields (including media such as television, radio and published cartoons) before his debut as a successful author in 2000, which led to the inception of BTG Studios, followed by The Lost Bear Company and the uptake of several creative projects, which he continues to work on to the present.Greive rose to prominence as an author in 2000 with the release of his hugely successful "The Blue Day Book", a collection of amusing animal photos and inspirational text designed to "lift the spirits of anyone who has got the blues.