A novel is like a pinball game.
When the shiny new character launches onto the game board, it caroms off the pins, bumpers, and flippers of the plot, tracing out the wiggly path we call a story. For the author, it's an even bigger gamble.
The Hidden Perils of Suicide
The Hidden Perils of Suicide: Sex and Death in 2099 California
UFO Pulp Fiction For The Twisted Mind.
An archaeologist extracts a coded message from a pre-Colombian sculpture, disclosing that Earth is a failed colony of an ancient galactic race.