Silver is considered one of Italy's best humorists. After several studies and jobs, Guido Silvestri, better known as Silver, joined the Bonvi Studios. He debuted in 1971, drawing 'Cattivik' in Tiramolla, and cooperating on the 'Nick Carter' series by Bonvi and Guido de Maria. In 1973, he created 'Lupo Alberto' in Undercomics. This series, about a crazy wolf, was an instant hit and soon found its way to other magazines and and journals, like Corriere dei Ragazzi and Eureka.
Silver began working as a caricaturist for the daily newspaper L'Occhio in 1978. He became the editor of Euréka magazine in 1983, together with Alfredo Castelli. In 1989, he became his own publisher, and after two years, head of the Macchia Nera label. 'Lupo Alberto' continues his adventures at Glénat Italia. Silver set up his own studios to continue the adventures of 'Lupo Alberto' and 'Cattivik'. Artists and writers that work for this studio are Piero Lusso, Bruno Cannucciari, Giacomo Michelon, Giorgio Sommacal, and Massimo Bonfatti.