Book excerpt: On the first page of The Book Borrower, Toby Ruben and Deborah Laidlaw meet in 1975 in a New York City playground, where the two women are looking after their babies. Deborah lends Toby a book, Trolley Girl,--a memoir about a long ago trolley strike and three Jewish sisters, one a fiery revolutionary--that will disappear and reappear throughout the twenty-two years these women are friends. Through two decades Deborah and Toby raise their children, embark on teaching careers, and argue about politics, education, and their own lives. One day during a hike, they have an argument that cannot be resolved--and the two women take different, permanent paths--but it is ultimately the borrowed book that will bring them back together. With sensitivity and grace, Alice Mattison shows how books can rescue us from our deepest sorrows; how the events of the outside world play into our private lives; and how the bonds between women are enduring, mysterious, and laced with surprise.