Related Clues:

• Oval cone not completely reshaped?
• It spews lava
• Mount St. Helens, for one
• Kilauea, e.g
• Lava emitter
• Half the book by staff isn't finished to order - one is bound to blow one's top
• Ultimate source of granite
• Eg, Vesuvius or Etna
• Book has the ability to offend for a start -- might one blow one's top?
• Ascending feature of Snowdon, a cloven peak, one gets hot
• Fiery mountain
• Source of lava
• One heated occasionally blowing top
• Etna, e.g
• Mauna Loa or Stromboli, say