New this week: The Most of Nora Ephron; At Night We Walk in Circles by New Yorker 20 Under 40er Daniel Alarcón; S., a novel written by Doug Dorst in collaboration with J.J. Abrams (which naturally has a trailer); and The Gorgeous Nothings, a full-color facsimile of poems that Emily Dickinson drafted on the backs of envelopes. For more on these and other new titles, check out our Great Second-Half 2013 Book Preview.