This entry was published at least two years ago (originally posted on March 23, 2022). Since that time the information may have become outdated or my beliefs may have changed (in general, assume a more open and liberal current viewpoint). A fuller disclaimer is available.
18/2022 – ⭐️⭐️⭐️
A definite improvement over the second book in the series. The hard-SF aspects are explored well, with a focus on the mysteries of the Heechee, AIs, dark matter, and consciousness, all without the troublesome themes of the prior book.