As Gibson and Stephenson were already mentioned I would like to mention the "Takeshi Kovacs" novels (Altered Carbon, Broken Angels & Woken Furies) by Richard K. Morgan and "True Names" by Vernor Vinge. You might also have a look at the "Mirrorshades" anthology published by Bruce Sterling.
I played and finished both. In the end I enjoyed both, for DA 2 it probably helped that a friend of mine recommended that I should play/see it as action game and not a fully fledged RPG. But I really, really enjoyed Ni No Kuni and would rank it in my Top 5 for 2013, so I would recommend Ni No Kuni.
P. S. Regarding the time investment, it took me 80:37 hours to get Platinum in Ni No Kuni