This book is less about the psychology and behaviour of "explosive children" and it's really a handbook for using the "problem solving" method for resolving conflicts before or as they occur. It lays out why some kids have a hard time coping with situations that others breeze through (mostly lagging skills), shows how the traditional command and punishment/reward approach doesn't work and lays out how to use the problem solving strategy to try and eliminate the inciting issues and help develop some of the skills that are lagging. There are lots of Q&A sections and it's all illustrated with stories of families coping with behaviourally challenging kids.

I think the book is mostly targeted at the parents of school age kids, but the principles seem like they should adapt to pre-school kids and adults as well. It's a little dismissive of traditional diagnoses, suggesting that a general process for managing behaviour might be more useful that specific treatments and medications for developmental disorders. Despite this there's no obvious reason the books advice won't work along side more specific treatments as the goal is to collaborate with the child to develop solutions that work well for them and their parents.