When World War II was declared Wolpe, along with other German nationals living in England, was sent to an internment camp in Australia. He was permitted to return to England in 1941 and joined the production department at Faber and Faber. His use of Albertus and hand-painted lettering became strongly identified with Faber jackets in the years that followed, and continued from 1958 on the Faber paper covered Editions. He remained at Faber until his retirement in 1975 and is estimated to have designed over 1,500 book covers and dust jackets.