Mr. Hornsby and the Time-Traveling Classroom

Mr. Hornsby's back, and American civil rights are in jeopardy!
After traveling back through time with his students to the White House in 1891, seeing Babe Ruth play baseball in 1919, diving away from bullets on the frontier in 1844, and even rescuing the Roaring Twenties, he'd thought he'd seen it all. Yet nothing could have prepared him for what's about to come next!
In this thrilling follow-up to Secrets of the Pierce Journal, the evil group of time-traveling colonists known as the Loyalists have planted another deadly trap; and it's up to Mr. Hornsby and his best friend, Rosie, to once again take on the past to save the future. If they can't stop the enemy in time and unravel the truth behind the mysterious target, American history will be lost forever.