An Idiots guide to Archaeology & Anthropology
I haven't read the book, but why if it took Odysseus 10 years to travel back didn't it take him ten years to travel to Troy ? Why would anyone fight a war over Helen of Troy ? Perhaps it's just a story. Dragons aren't universal and aren't even the same where they are described.
There is no indication how long it took Odysseus to get to Troy!! The war was not over Helen but regional dominance. As for Dragons - they are known in all four continents of the World - that's why you need to read the book!! B-)