the evolved dinosaur, and Thea, the scholar from Alexandria, are thrown into nineteenth-century America after an accident with their time-travel vessel. Unfortunately, Clyne is stranded alone in potentially hostile territory, while Thea and Eli pop up at the beginning of the famed Lewis and Clark expedition. After Thea is mistaken for an escaped slave and taken into custody, Eli joins Lewis and Clark's Corps of Discovery in hopes of finding Clyne, a means to rescue Thea, and transportation home. While trying to escape and regroup, Eli and his friends make important discoveries about their "accidental" stumble into 1804. It looks like they were lured by a Prime Nexus, which they may have caused, and which will surely change all of history to come. Danger Boy and his time-traveling companions meet up with an earlier expedition — the historical journey of Lewis and Clark. City of Ruins After another close call, the good news is that Eli Sands, aka Danger Boy, is back in San Francisco in 2020. The bad news is that Eli and his friends, Clyne the evolved dinosaur and Thea the Alexandrian scholar, are being held captive by the government agency DARPA. Since their last foray into the Fifth Dimension, it seems history has been unraveling everywhere, and the deadly smallpox virus is spreading fast. DARPA's plan is for Eli to visit ancient Jerusalem. But Eli and crew discover that the city is in ruins from a Babylonian invasion, and soon an angry mob is ready to stone them. References External links Official Danger Boy page Children's science fiction novels 2000s science fiction novels Series of children's books Novels about time travel Science fiction book series American steampunk novels American novel series Books with cover art by Michael Koelsch