Thank you for the books and the suggestions. I understand the warnings since I did not really provide any information on my project in the post. Essentially, I am writing a batteries included language to act as a replacement for LaTeX (or at the moment, a small subset of it). I cannot use any existing library since they do not work for my own PL and I do not want to go through PostScript -> PDF since the reason I started this project was because the time delay between saving a .tex file and seeing the output on my pdf reader was becoming very long.