July Books 5) The Lacuna, by Barbara Kingsolver
I very much got into this story of a young American in Mexico who ends up working for Diego Rivera and Frida Kahlo, is present at the murder of Trotsky, moves to the USA (where in fact he has not previously lived) and gets caught in the web of McCarthyism. Lots of good description and acute personal observation. Not quite as gripping as The Poisonwood Bible, but perhaps a bit more circumstantially convincing.