Beta version 0.5 of the book was published on 8.19.2010:

original chapters from beta version 0.1:

1. introduction
2. the age of distraction
3. the importance of finding focus
4. the beauty of disconnection
5. focus rituals

chapters from beta version 0.2:

1. a simple system for getting amazing things done
2. the power of a smaller work focus
3. limiting the stream
4. slowing down
5. going with the flow

chapters from beta version 0.3

1. effortless action
2. 3 strategies for prioritizing tasks
3. creating an uncluttered environment
4. tools for beating distraction
5. walking, disconnection, & focus

chapters from beta version 0.4

1. the value of distraction
2. focused reading and research
3. letting go of goals
4. you don’t need to respond
5. let go of the need to stay updated

new chapters:

1. how not to live in your inbox
2. single-tasking and productivity
3. finding simplicity
4. finding focus, for parents

This was the fifth version of the book. It only contained these 23 chapters, each chapter fairly short.