This is the best science fiction I have read in years. Bear’s command of Teacher’s story gripped me from page one and did not let go. The story is dark and haunting, and I loved every page of it.Science fiction writers sometimes make their tales more about the science and less about the characters. Not Bear. He carefully intertwines all the qualities of science, which makes science fiction fun, yet he never loses Teacher or his bleak story.Nuanced with lovely prose, Bear reminds us that science without a conscience can be deadly.