The main path going forward in improving Markov chains is expanding the individual "unit" that are selected by these chains. Current Markov chains only randomly select words to string together into semi-coherent thoughts, but what if they instead randomly select paragraphs, or even entire chapters? This will promote large-scale structure within the book, and ensure the plot will always be varied and engaging.

I hope that your grandchildren's Bachelor of Science would train them in curating brilliant works of art that can then be feed into the Markov chain and perform the one-dimensional random walk.