Atlantyca Entertainment has taken on Biplano as the exclusive licensing agent for the Geronimo Stilton property throughout Spain and Portugal.
The agreement grants Biplano rights to licence the brand across all categories except publishing and live events.
"We look forward to expanding Geronimo's fan base even further with new licensing initiatives that will build upon the incredible momentum the books have already initiated, sustaining an estimated 24 per cent of the Spanish book market," said Jordi Rey, Biplano's general manager.
Maria Giovanna Gurrieri, Atlantyca's licensing and agents director, added: "We are really excited to begin a working partnership with Biplano, a company that combines well established relationships with retailers and licensees with a true understanding of the Geronimo Stilton brand.
"Biplano's proven expertise, together with the property's enormous success throughout Spain and Portugal, provide a solid foundation for the future success of many new branded products."