I am a novel writer for the first time, I am sorry in advance. ;]
Basically, my book is set on Vancouver Island, but I need to alter some important facts about it. My book needs a tunnel from the continent to the island. I need an abyss for my heroine to jump over her bmx to escape the bad guys. I don't know how to alter my world, so it could be any generic tourist island or do I create a new world for this to happen, that it simply has Tetris and hummers? I don't know how to choose! Suggestions dear enough please!