Robert B. Parker's Slow Burn by Ace Atkins (2016) G.P. Putnam's Sons

A Spenser story about fireman wannabes who think the Boston Fire Department needs help with budget for men and equipment to fight fires – and their brilliant solution is to start fires.  But that puts fire fighters and sparks, the people who provide coffee and blankets for the firefighters at risk.  Spenser is looking into what one of the Fire Chiefs thinks was the first incident where three of their own died.  At first glance it looks like fire for profit, leading Spenser to think a local made guy or his organization is responsible.  Instead that guy provides the video proof they need.