Myst: The Book of Ti'ana was the second book in the Myst series, though it is actually a prequel to Myst: The Book of Atrus and is the first entry chronologically in the Myst series. The Book of Ti'ana covers the D'ni project of tunneling to the surface, in hopes of having a peaceful relationship with the humans there. After the project is abandoned, a woman named Anna finds the Tunnel through a crack in a volcano, and follows it to D'ni. The Book of Ti'ana is about Anna (given the D'ni name Ti'ana), and how she meets Aitrus and gives birth to Gehn. On a grander scale, The Book of Ti'ana covers the fall of D'ni by Veovis, and Ti'ana's part in sparing his life. The events in this book are briefly described in The Book of Atrus, and gives an explanation for Gehn's anger and madness.