ENCYCLOPAEDIA OF INVISIBLE ART
Five paintings atop of the stairs of whispers are suspected of containing encoded, top-secret information. Suspiciously, the owners claim the paintings are just primed canvases – depicting nothing – that have been covered up recently due to attracting nuisance crowds of unwarranted sightseers. Your mission is to go undercover and reveal the truth of this situation by ascertaining whether the paintings are, indeed, primed canvases and the cover-up is, just, a cover-up. Go disguised as an art viewer and note all suspicious circumstances – such as other art viewers. And remember, nothing is never nothing.

• stairs of whispers
• four covered-up, invisible paintings
• undercover passageway
• hidden entrance disguised with invisible paint
• where two, undercover secret intelligence officers heatedly debated whether an invisible painting is still a painting – albeit one that cannot be seen
• chairs
• fifth covered-up, invisible painting
• bench upon which to open the tins of invisible paint with screwdrivers (to lever their lids)
• tins of invisible paint on shelves
• library of hidden, possible meanings rumoured to be behind these five paintings (inscribed in invisible paint)
• a seemingly empty room with walls inlaid with invisible meanings
• an internal, purpose built lake guaranteed not to leak
• blue vinyl carpet
• hidden space for secret intelligence agents with an entrance disguised with invisible paint