Jeschke, Wolfgang

Time travel is a risky concept to use in sf because of all the paradoxes and advanced science involved. While the German sf author (The Last Day of Creation) does an able job, the book makes for a dense read, with a lot of explanation and reexplanation of concepts. There's some interesting speculative science, including failed trips to Mars and genetically modified dogs that can talk, but it gets lost among all the explicating. Recommended for hard-core fans of the science in science fiction. [Previewed in Kristi Chadwick's genre spotlight feature "New Worlds To Explore," LJ 4/15/13; ow.ly/poF36.—Ed.]