 In 2000, Martin planned to take 18 months to two years for each volume and projected the last of the planned six books to be released five or six years later.However, with "A Song of Ice and Fire" series evolving into the biggest and most ambitious story he has ever attempted writing, he still has two more books to finish .Martin said he needed to be in his own office in Santa Fe, New Mexico to immerse himself in the fictional world and write.