Review by Morpheus Kitami for Deep Purple - Fireball (1971)

In Rock seems like something of an oddity in retrospect in how aggressive it was. Fireball corrects the deviation by putting itself quite firmly in the rock category. The title track is a fun number, but it stands firmly in rock, lacking any heaviness to it. 
Then as the album goes on, it gets very tedious. At least, the version I heard off Youtube, which seems to have a different track order from even the constantly shifting official releases. Most of side a seems to consist of mid-paced songs with drawn out choruses with a driving beat to them. And then we have a poor excuse of a folk song knockoff in Anyone's Daughter. Yawn.
But then what would have been side b shows up and the album redeems itself a bit. Bit more chaotic in tone, bit more like how Deep Purple should be. We even get a dry run of Smoke on the Water in No One Came.
This one seems to have a historical opinion of it about where it should be in my opinion. There are good bits, but for the most part, it's very meh.