Obsession question

I have read a few trilogies and book series that have really captivated me, i.e. Diana Gabaldon's Outlander series, Paullina Simons' The Bronze Horseman trilogy, Sara Donati's Into the Wilderness series, Jean Auel's Clan of the Cave Bear series. I loved this "Year of Fire" trilogy by Florencia Bonelli. I am looking for suggestions for other series that grab you and don't let go until the last word!Florencia Bonelli