Jean-Luc Picard is currently the most discussed Trek character. Many of his adventures were written down in novels. He had to deal with crisises - both professional and private - throughout his career. In PIC he has to help the Romulans, who have a difficult past with the Federation and have the Tal Shiar watching over them. Not to mention dealing with rogue Androids attacking Mars. In the literature timeline he remained aboard a starship. The Borg invasion left many worlds uninhabitable. No Risa anymore, Deneva and other worlds destroyed. The Federation with a shortage of manpower in their fleets, forcing many young officers to fast-track their career (e. g. Ezri Dax and others). The years following the invasion shaped by rebuilding efforts, single characters dealing with traumata of personal losses. I almost forgot the Section 31 exposure and Picard's involvement (I haven't read Collateral Damage yet). Which crisis is the biggest challenge for Picard and why?