Two more Vulcanverse gamebooks are in the layout stage right now and should be available next month. John Jones has kindly prepared a checklist of codewords and tick boxes for the first two books so you don't have to write in your copies. You can get that here and a blank Excel adventure sheet by the equally generous Puck Jackson here.
And there are also the PDF copies of the adventure sheets:
Hades (for The Houses of the Dead)
Notus (for The Hammer of the Sun)