ACE RivKNIVES DONE RIGHT. Introducing the Riv Many people look at the Riv as a mini Biblio. However, GiantMouse did not just shrink a Biblio to do the Riv. GiantMouse started over and completely redesigned a new knife in the lines of the Biblio, but with its own feel and expression. This was also the way they designed the Biblio, from the lines and concept of the GM1. Of course it would be easier to just scale a knife model up or down to any size you think