Recommendations of recent books from the staffs of a rotating list of Bay Area independent bookstores. Following “The Snow Child,” Ivey returns to the fictional Wolverine River Territory, this time with an 1885 exploration. Waiting back in Vancouver is the expedition leader’s wife, and Ivey parallels the stories of his brutal journey and her unconventional independence. Ten-year-old best friends devote a sweltering July to investigating a mystery: In searching for Mrs.