"Hold Fast" Spencer K. M. Brown, Wiseblood Books (2022) 328 pages, $10   "But still the desire is there, that hope for salvation, for love, for truth. Sometimes that desire to believe in something might just be enough. These are the new martyrs. No more burnings at the stake, no beheadings or crucifixions. But those who simply hold fast to that tiny possibility of hope, of love." These words, coming roughly two-thirds of the way through Spencer K. M. Brown's 2022 novel, "Hold Fast," serve as something more lyrical than a thesis statement for the story as a whole. Set in the icy heart of a North Shore winter, "Hold Fast" is the tale of a father and son in…