Collects Clean Room #12-18
"In these stories from CLEAN ROOM #13-18, discover how Astrid was first affected after her hospitalization through the eyes of one who cannot see what she sees: her brother and would-be assassin, Peter Mueller. Then, a woman devastated by the violent loss of her husband finds comfort in Astrid Mueller's teachings, only to face the woman herself in the most nightmarish reaches of the Clean Room!" Source: vertigocomics.com