How Alexander and Cricket Save Uncle Chad — Debby L. Johnston

When a scientist, the revered uncle of thirteen-year-old Alexander Tennyson, mysteriously disappears, Alexander follows clues that Uncle Chad has left behind in his journal. The clues hint at treachery and abandonment—in an ancient past among two million newly freed Israelite slaves. A chance meeting with a brilliant quadriplegic girl lets Alexander reach across the millennia to attempt a rescue. But finding Uncle Chad is not the end. Instead, it leads to an unexpected second rescue that is harder and demands forgiveness. Can Alexander forgive?