Barbara Venkataraman 
The Fight for Magicallus [EPUB ebook] 

While experimenting with a magic wand, two young brothers are pulled into a computer game called The Fight for Magicallus.
In the land of Magicallus, they encounter goblins and knights who are on the brink of war because their ruler has mysteriously disappeared. The knights blame the goblins, and the boys learn of a frightening prophecy that foretells the end of Magicallus. They must find an ancient book hidden in a dragon’s lair before the prophecy comes to pass and they are all destroyed.
Can the boys find their way home? Will the knights and goblins go to war, or will the dragon destroy them all?
A fast-paced adventure filled with humor and suspense, The Fight For Magicallus is an exciting fantasy tale for readers of all ages.