Action/Adventure Story: This is a direct continuation of "Regrowth." Please read that story first or this one won't make sense. Here, the Brinkley family continues their battles against the bad guys. The main opponents are ISIL (formally known as ISIS), human traffickers, and drug smugglers. Also, the family starts to grow, and they pick up some valuable allies.
Please read "Regrowth," the first book in the series if you have not already done so. Otherwise, "Expansion" will be confusing. "Expansion" is a direct sequel of the first story, and no effort will be made to reprise that story.