Barnes & Noble picks up Ellie Lawson's "The Philosophy Tree" as part of its "Recommends" program, and will sell it exclusively for six months starting Aug. 2. Read Melinda Newman's column.

Barnes & Noble picks up Ellie Lawson's "The Philosophy Tree" as part of its "Recommends" program, and will sell it exclusively for six months starting Aug. 2. Read Melinda Newman's column.