Scott Duncan
...or just point out,"Mommy's brain is broken, so she thinks the wrong things", and then point out that "you will be a kook, like mommy if you don't read these books":
1: A Demon Haunted World: Science as a candle in the dark - Carl Sagan 2: God is not Great: How religion poisons EVERYTHING. - Christopher Hitchens 3: Why people believe weird things - Michael Shermer. 4: Flim Flam - James Randi