The Annals of the Heechee is a science fiction novel by the American writer Frederik Pohl, published in 1987 by Ballantine Books.

It is about a dead space explorer's machine-stored version who is trying to discover why the Assassins, a mysterious type of pure energy beings, are threatening the stability of the universe.

Broadhead is trying to resolve the issue of the "Assassins", which are pure-energy beings that stopped the expansion of the universe and triggered its contraction.

[1] Kirkus Reviews' states that the novel has "[n]o plot, a subplot that fizzles, chunks of cosmological explication, uninteresting aliens, and thoroughly boring characters" and calls it "...one of the least engaging Poh[l] [books] in many a year, and thus strictly for Heechee addicts.

"[2] David Langford reviewed The Annals of the Heechee for White Dwarf #98, and stated that "Though the quality of writing stays at an unflashy 'good average' throughout, this is a classy example of hard SF as it sometimes used to be.