Leviathan are a Progressive/Power Metal band from the US; this is their fifth album.
This is an ambitious release; 76 minutes of Metal, broken down into multiple interludes and the actual songs themselves.
Leviathan have a strong, full sound from the outset. The band are skilled musicians and make good use of all of the instruments available to them, while the production ensures that everything sounds clear and crisp.
The singer has a good voice that is not quite full on Power Metal but neither is it unrestrained. He can belt out the powerful notes when he needs to.
The songs are involved and have plenty of instrumentation, which may be slightly ostentatious but not gratuitously so; there’s a lot of technical flashiness but the ultimate aim is always to enhance rather than just for the sake of showing off.
Check out Leviathan and give them a try.
Wonderbox Metal 
Holy fu()shit… If you wanna try it, don’t start with the first piece. It hurts.