Lola learns about the Tooth Fairy's friend, el ratón, in another adventure celebrating her Guatemalan heritage! Lola is excited when her cousin Luis comes to visit from Guatemala. The fun doubles when they discover that they both have a wiggly tooth! Lola is looking forward to a treat from the Tooth Fairy when her tooth comes out, but Luis is worried. How will el ratón—the Guatemalan mouse who brings money for lost teeth—find him in Texas? Lola helps Luis brainstorm solutions to this problem, but el ratón may have a surprise in store for them both! Readers will delight in meeting Lola, her family, and friends in this charming chapter book from the Hola Lola series, focused on family, heritage, and cultural exploration.