Unia is the fifth full-length studio album by the finnish power metal band Sonata Arctica, following the album Reckoning Night. The first single from the album was "Paid in Full", released on April 27, 2007. This is also the last album that features Jani Liimatainen, who was later replaced by Elias Viljanen after the album was released. The album was mixed at Finnvox Studios and mastered at Cutting Room Studios in Stockholm, Sweden. The album was also released as a limited edition noble book in 7" size (1000 copies), exclusively available via mailorder from Nuclear Blast records. The limited edition came with a differing track listing and bonus tracks "They Follow" and "Out in the Fields".