A shimmering sheet of ice blankets Barmet Bay's pristine frozen surface in this eighth installment, from 1929, of the original Hardy Boys mystery series. The ice is perfect for an exhilarating iceboat adventure to a secluded island. Elroy Jefferson -- who was in the sixth volume, The Shore Road Mystery -- is the wealthy owner of Cabin Island. Little do the Hardy Boys know that their chance encounter with the enigmatic Jefferson will lead them to a thrilling escapade in his island paradise, brimming with danger, intrigue, and the promise of a Christmas to remember.