To use this Frosthaven solo scenarios pack, first, make sure your character is at least level 5 and matches the icon of the scenario you want to play. Then, simply pick a scenario from the book and start your solo adventure. Remember, each character can only complete their solo scenario and earn the reward one time. As for maintenance, keep the book in a dry place to prevent it from getting damaged. And that's all you need to know to enjoy these challenging solo scenarios in Frosthaven!