Time Meddlers Undercover — Deborah Jackson

One of Canada's top scientists has discovered the secret to time travel. But something has gone horribly wrong . . . again. When thirteen-year-old Matt Barnes finds out his time-travelling father is trapped in occupied Holland during World War II, there's only one thing he can do. Even though he's been forbidden to use the multiverse time machine, he drags his best friend, Sarah, along with him on another leap back in time. When they land in the war-torn country, they're immediately caught up in a world of high intrigue and dangerous covert operations. They encounter courageous pilots, determined spies, gallant members of the Dutch resistance, and ordinary heroes. Matt and Sarah receive the surprise of their lives when they meet the legendary Anne Frank.

But . . . with what they know of the future, the time travellers will be tempted to meddle again. Can they prevent a blunder by the SOE--Churchill's spy organization--that will cost so many lives? And is it worth it, when interfering will force Matt to choose between the two most important things in his life? Meddling = Courage + Sacrifice.

 * Time Meddlers is Recommended in the Children's Literature Review and Canadian Teacher Magazine