Children from the Sea
This has been optioned under the same name as a screenplay in Hollywood.

Mihte's Quest: Kids in the Underworld
There are two more books in the series to be published soon. They are Mihte's Challenge: Can Jack defeat the Dread Lord of Anihilation and Mihte's Return: Arthur unmasked This has been optioned as a screen play in Hollywood. A sequel children's television cartoon is in production most likely called Mihte: Lugh the Shining One.

Henri and the Alien
This has been optioned as Henrietta's Odyssey as a screenplay in Hollywood. A sequel children's television cartoon is in production most likely called Henrietta.