You also write The Forbidden Files for children aged 8 and up. Can you tell us a little about them?
You can buy Oisin's books from all major retailers and also for this Mad Grandad and The Forbidden Files series from the publisher O'Briens website!
Stalk the author:
You can also find me on Facebook at: http://www.facebook.com/oisin.mcgann.7
And follow the author on Twitter @OisinMcGann.
If you have missed any of the posts for the childrens book event, click the banner along the top of the blog to take you to a list of all the posts. There are some great posts there along with some great giveaways, all international!