It's Monday morning, and kid detective extraordinaire Mickey Rangel is on the hot seat. "You must be wondering why Ive called you to my office," said Mrs. Abrego, the school principal. And in fact, Mickey has been racking his brain and sweating bullets, trying to figure out what he has done to warrant being pulled out of homeroom. Could it have been the spitball fight with his twin brother Ricky on the bus? How could word have gotten to Mrs. A that quickly?

When she instead brings up the recent rash of graffiti on school grounds, Mickey is initially horrified that she might think hes involved. But he quickly realizes why she has called him in: she needs his help! Mrs. A has heard that Mickey is a detective, and he confirms that hes the "real deal," with an online certificate to prove it. She wants him to unmask the Magic Marker Mischief Maker, the person writing messages all over the schools walls.

The culprit has left numerous clues in his postings, mainly a pronounced lack of grammar and spelling skills, and that, along with an anonymous message from a supposed eyewitness pointing the finger at Mickeys life-long nemesis, Bucho, seem to make for an easy case to solve. But Bucho has denied the accusation and asked for Mickeys help. So Mickey, flabbergasted but intrigued, is "on the case."

In the third book in the Mickey Rangel Mystery series for intermediate readers, author and educator René Saldaña, Jr. has once again crafted an appealing book for kids, and his wise-cracking, smart protagonist will appeal to even the most reluctant readers.