Books that can be summed up in a single phrase tend to be not worth reading.
Fooled By Randomness (2005) by Nassim Nicholas Taleb postulates that most successful stock traders are more lucky than skillful. There, I saved you 316 pages and $17.
Halfway through the book my cat Dot spilled a mug of tea onto it, making it unsellable. I take particular delight in throwing it into my garbage can.