asakiyume suggested a snow initiation for new members of the Caldecott committee, which sounds about right. I'm envisioning candles and snow storms and chanting.

Or maybe there's just some mystical connection between librarians and snow, and no initiation is necessary to awaken it. Who can say?

If it's a metaphorical well I'm going to be very sadface. That was the only bit of actual plot information in the description!