Ah-ha!

I feel exonerated! These books all had less than 50% chance of being a bestseller:
A Tree Grows in Brooklyn--10.2%
The Cae for Christ--35.9%
White Oleander--41.4%
The Bridges of Madison county--35.9%
Tuesdays With Morrie--45.6%
Harry Potter and the Sorcerer's Stone--45.6%
The Da Vinci Code--39.5%
Pet cemetery--35.9%

So I think I'm probably okay, don't you think?

Well no wonder.

The Lulu Titlescorer tells you how likely your book's title is to make it a bestseller. Turns out Worlds Collide only had a 10.2% chance--no wonder it hasn't sold into royalty yet! Unfortunately I am not that good at picking titles, apparently, since Violette Between only has a 14.6% chance. Hm. At least I know where to go now to test drive my titles before making my final decision. (And yeah, yeah, I know it's all in fun...but I'm still going to run some bestseller titles through it to see how well they score. Just in case.)