Good point. I've updated the spreadsheet to reflect Worlds' current stake (as reflected in the latest 10-Q) in MRMD.
That brings Worlds' book value to $0.232/share, with the current price/share still below book, but only by about 5%.
WDDD's current price reflects the opinion that Worlds will lose all litigation (at the CAFC, PTAB, Activision case, and all other potential cases).