Teenage detective Tandy Angel attempts to exonerate her famous brother of murder charges, track down a New York City killer, and figure out what happened to her lost love.

"Robots on strike! Sammy's underappreciated mechanical helpers cause chaos in the house. It's up to Sammy and his disabled sister Maddie to keep the peace until his inventor mom reveals her secret project--and why it was worth the wait"--

"Fifth grader Sammy Hayes-Rodriguez has to find a solution when his robot 'brother' has repeated malfunctions at school and a newer model robot steps in as competition--and his mother's job is in jeopardy as a result"--

Rafe Khatchadorian's new year at middle school is starting to look depressingly like the old one, except that art class is going well--and when he joins the flag-football team and demonstrates some talent as a running-back, he discovers a way of dealing with his bullying nemesis and teammate, Miller the Killer.

"Twelve-year-old Jacky "Ha-Ha" Hart is a class clown with a penchant for pranking--and when she's required to act in the school play to appease her frustrated teachers, she must conquer her stutter."--

As she fights for the family company, Tandy Angel's detective prowess is called into question and her paranoia builds, forcing her to face the possibility that her stalker could be all in her head--or the very real danger that will finally bring her down.

"Sixteen-year-old Tandy Angel moves to Paris for a fresh start with her siblings and to be reunited with James, her lost love, but her detective work soon uncovers long-buried family secrets that threaten to destroy her life"--