Van Nieuwenberg William
By far the best book among the 1st 6 I've read. Finally some world event, some proof that the voluntary soldier guild is more than just an NPC recruiting player characters for his survival RPG. Also it explores the mystery of the transportation to Grimgar a bit. Too bad it does a plot twist to avoid going deeper into it and the past of the characters (probably the most interesting thing about them since sadly as people they really lack consistence, their characters are too surface level, they have no passion, no interests and all, except for Ranta and Moguzo with food). I wish the anime had adapted this book too, it would definitely have been great to watch (better than it is to read it).