Mrs. O has a problem. She turned her back for a second and now there are two of her son Oliver. Mrs. O turns to the only place in Alphabet City to get help... A to Z Detective Agency and the Lead Investigator, Mr. E. Can Mr. E figure out why there are now two Olivers? Why do the two Olivers sound so different from a single Oliver? Find out in Mr. E and the Case of the Double Os. Find fun educational printables to partner with this book on MrEMystery.com.
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