Heather Morell is haunted. Otherworldly nightmares and monstrous hallucinations lurk around every corner, relics of childhood bereavement and schizophrenia.Until she meets Evelyn and Raine—a bad-tempered mage and her self-proclaimed bodyguard—and learns that she's not insane after all.The monsters she sees are all too real, the god-thing in her nightmares is teaching her the secrets of creation, and her twin sister—the lost girl who supposedly never existed...

This comprehensive text introduces regression, the general linear model, structural equation modeling, the hierarchical linear model, growth curve models, panel data, and event history models, and includes discussion of published implementations of each technique showing how it was used to address substantive and interesting research questions. It takes a step-by-step approach in the presentation of each topic, using mathematical derivations where necessary, but primarily emphasizing how t...