In a book, optimistic concurrency is not used correctly. It is in fact not "last change wins" -> this actually represents concept without concurrency control. Optimistic concurrency is wrongly described as form of pessimistic with versioning.

Hi Bojan,

This is a mistake that has been sent to the editors for future editions and should be listed in the errata. Of course, that's no excuse and as a perfectionist, it hurts me a lot that we let such an obvious error make it through. There was a lot of iteration on that chapter, though.

Sorry if it ruined your enjoyment of the book. And sorry for the delayed reply, the RSS on this forum doesn't appear to be working.

Nick