Enevhar Aldarion
Hero
Q1 is a Level 10-14 module, and the levels from older Editions translate to 5E pretty well, so a Level 10-15 Asventure would make sense.
WotC does not publish big hardcover adventures that do not start between level 1 and 5, so I would expect another book that has filler stuff at the beginning, to get characters to level 5-6, and then the real adventure starts and maybe runs to level 14-15. WotC keeps saying that high level-only stuff will not sell enough for them to publish it.