Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Lost_World_(Doyle_novel)

Release date is 2016-04-21

E-text prepared by Juhani Kärkkäinen and Tapio Riikonen

"Kadonnut maailma" by Arthur Conan Doyle is an adventure and science fiction novel published in 1912. When journalist Edward Malone seeks a dangerous assignment to impress the woman he loves, he's sent to investigate Professor Challenger's wild claims about discovering living dinosaurs on a remote South American plateau. Joined by a skeptical rival scientist and a seasoned adventurer, the expedition ventures into uncharted territory where prehistoric creatures still roam—but reaching this lost world proves easier than escaping it. (This is an automatically generated summary.)

Original publication data not identified