If you can only read one book on the immigration issue, read Mexifornia (Encounter Books, 2003), which author Victor Davis Hanson accurately describes as "part melancholy remembrance of a world gone by, part detached analysis by a historian who knows well the treacherous sirens of romance and nostalgia, and part advocacy by a teacher who always wanted his students to be second to none." Those students are mostly immigrants or children of immigrants from Mexico, and Professor Hanson—a fifth-generation Californian who runs a family farm—teaches them about ancient history and civilization at California State University-Fresno. He is also the author...