Ramona and Beezus, a sunny and guileless G-rated confection, tries earnestly to make up for lost time by squeezing something from almost every one of those eight books into one movie.

Back in the reality, the movie follows the adventures of the 9-year-old, her teenage sister, Beezus (Disney star Selena Gomez), baby Roberta, dad Robert (John Corbett) and mom Dorothy (Bridget ...