Comment by jibal

An implementation of zip tree insertion and deletion is in the paper. concurrent zip trees is another matter. I don't know why you can't view something that Princeton charges $5 for, but in any case I think you would find the thesis disappointing ... the arxiv paper says "The third author developed a preliminary, lock-based implementation of concurrent zip trees in his senior thesis [12]. We are currently developing a non-blocking implementation." -- I would wait for the latter.