What a great project. Since The Road is an apocalyptic book, it might be interesting to compare another apocalytic books with a different point of view. From this perspective, how about the book of Revelation from the Bible? It is the vision that John the apostle saw on the island of Patmos about what is to come. There are three benefits of using the book of Revelation.
First, the book of Revelation is an ancient book that has endured the test of time. In other words, it still speaks to people today. Keep in mind that the Bible is the bestseller year after year.
Second, the imagery of the book of Revelation is rich. In fact, it draws upon the rest of the Bible. Hence, you will not be able to exhaust it at all. In other words, you will have a wealth of material with which to work.
Third, the contrasts between the two work are so great that a number of interesting questions can be asked. Scholars for example has compared the poetry of the Roman poet Vergil to the apostle John.