The LISP 1.5 manual [1] is quite old, fairly straightforward, but still seems 'fresh' to me. The Arxiv [2] seems to always have to newest ideas, and CiteSeerX

The LISP 1.5 manual [1] is quite old, fairly straightforward, but still seems 'fresh' to me. The Arxiv [2] seems to always have to newest ideas, and CiteSeerX [3] has many, many popular (old) ideas. [1] http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf http://www.softwarepreservation.org/projects/LISP/book/LISP%... [2] http://arxiv.org/list/cs/recent http://arxiv.org/list/cs/recent [3] http://citeseer.ist.psu.edu/stats/articles http://citeseer.ist.psu.edu/stats/articles