Summer Lovin’

 Treasure Hunters by James Patterson and Chris Grabenstein  Of course, there’s hidden treasure. And ruthless pirates. A high-seas adventure-mystery perfect for the 9- to 12-year-old (good for the grown-up kid, too). There are also double agents. Rival spies. Kidnapped parents! Plus two twins (and their annoying older sibs) who tell the tale and lead the chase to find their missing mom and dad.…