An irresistible classic. Before the kids can say "Ivanhoe" three times fast, they'll be transported to castle battlements in medieval England, where Robin Hood is battling for Sir Ivanhoe's release. Appropriately enough, the novel's four American protagonists are also thus suddenly transported -- in their case, when a toy soldier comes to life. Eager's book is packed with period detail (especially molten lead!) and great good humor. Ages 8 to 12.  (GBR340, $6.99)