The Versions of Us by Laura Barnett

Random events and choices alter the course of a lifetime in this book.  Barnett tells 3 versions of a story:
  
  Version 1: Eva runs over a nail with her bike, Jim helps her fix it, they fall for each other and they get married.  
  Version 2: Eva misses the nail, has a big, grand wedding with her boyfriend David, and doesn't meet Jim until much later in life.  
  Version 3: Eva runs over the nail, meets Jim, falls for him, but leaves him and marries David when she finds out she's pregnant with his child.

Within each Version, Jim and Eva's paths cross and recross,  careers rise and fall, and marriages, children, and aging play a part in each of their lives.  The stories are told along parallel timelines, all spanning around 50 years.  There were a few events (Eva's brother's birthday party, for instance) that took place in all 3 versions, and it was interesting to read about it in three different circumstances.

I did enjoy reading this book, seeing how life unfolded in each version.  I did find it a bit confusing to keep straight at first though, and actually wrote myself a little note about what had happened in each version.  You might also find this helpful!