I've started to write my upcoming book titled "Notes to a software team leader" (hat tip to Kevlin Henney for the name idea). The book will combine many of the subjects my 5whys blog addresses, plus notes collected from some of the best minds in the management field, various stakeholders and actual team members.
If you're interested, you can be notified when it's published (chapter by chapter)- I will start publishing incrementally, in the coming days, over at leanpub.