These works show two different and opposite views of the future of humanity. While Ishiguro raises a renewal through cloning, McCarthy augurs a total destruction of the planet. Both novels are powerful stories with well drawn characters. Both leave a bitter taste in the reader’s mouth: the first because the cloned characters are perhaps too human; the second because it tries to find a shelter in a devastated landscape that the characters are not able to get. However, there is a light at the end of the tunnel.
Because of their compelling arguments, those novels don’t finish at the moment of reading the final line, but much beyond; they last in the mind of the reader for many days. After reading those stories, we can’t stop thinking about the characters. The stories give us a kind of vertigo.
The novel by Ishiguro arises from a question like the one in 'Die Verwandlung' (The conversion) by Kafka: what would happen if one day somebody started to make clones in order to give organs to humanity? The novel by McCarthy asks about the world after a man-made disaster: what would happen if only a handful of men survived?.
If you want to know the answers to these questions, just look for them in those two novels, already two essential works of today’s literature.