Senta and the Steel Dragon Book 4: The Young Sorceress is now available for $2.99 at Amazon for the Kindle.

http://www.amazon.com/dp/B007QYA2P6

and at Smashwords for every other device.

https://www.smashwords.com/books/view/147884

You should see it appearing at Barnes & Noble, Kobo Books, iBooks, Diesel eBooks, Sony Bookstore, and other fine ebook sellers within the next two weeks.