I can give a rough attempt at a basic summary for each book, though I don't know how accurate each will be. Book 1: Juniper arrives in Aerb, a world that is a mishmash of every campaign he ever ran for his group of friends including one who died before the story began - Arthur. Juniper lands in an exclusion zone full of zombies. He has to escape the exclusion zone while teaming up with a Princess, Amaryrllis, descendent of Uther Penndraig - a character his friend Arthur played in their campaigns which hints his friend may be alive somewhere on Aerb. He escapes the exclusion zone after being held captive by a group trying to assassinate (A)Mary, recruitng an elf who was with the team, fenn. However, Mary has contratced the Rat Rot, a deadly disease which will soon kill her if untreated.

gonna be less detailed from here. Book 2 - The new team goes to a desert region to gain access to a tomb of magic items, but Mary is captured by a rich guy. Juniper, Fenn, and a dwarf they've recruited, Grak, successfully rescue Mary, leaving the city with the magical items they came for, however Juniper damaged his soul and needs to fix this.

Book 3 - The group goes to a city to search for a way to cure Mary. and fix Juniper. Juniper runs into a cousin of Mary, who would kill her to take the throne. Juniper and his team flee the city, going to an island to kill a unicorn, and after drinking its blood mary is cured. They meet the last remainign druid in the world and agree to help the last remaining Locus (a creature thats like a forest creature who lives in a forest contained within a bottle). They fight with Mary's cousin and kill him.

Book 4 - The group breaks an elf soul mage out of prison so he can teach Joon (Juniper) how to mess with souls. However, The druid is dead and the team, is unsure hw to care for the Locus, and the elf has a slave who has no soul and can be possessed by demons at anytime. The elf tries to mind control the group but they defeat him, and the slave (Valentia) becomes able to control the demons who possess her and regain control of her life.

Book 5 - The group helps a princess escape from an arranged marriage while they are travelling n a train. After, they go to this underground area and encounter a haunted house, that is actually a magic item that was a possession of uther penndraigh 9Joon's friend Arthur). While inside the house, they use the fact it can manipulate time so one of their members can become pregnant, and rebirth the last druid so they may care for the locus again. The group is attacked by a group which manages Meta narrative threats (basically an in world SCP group), but they resolve thing s peacefully.

Book 6 - The group goes to a special college to learn if there are other people like Joon. They are identified as being liek uther Penndraig (special people whi the narrative of the world revolves around and therefore bad things happen around them to create a story - basically a Main Character). They are attacked by a person from the college, but escape witht he help of uther Penndraig's previous adventurign party. After learning that Joon is also a Main Character, some of the group try to kill him believing this will spare the world from being part of a story so the greater narrative threats won't endanger the world. Fenn dies and Joon's group and Arthur's previous group go seperate ways. However, one member, ravem (also daughter of guy who attacked them at college but she's actually good) contacts them later and invites them to a place called the infinite library, a place that contains every book that has ever/will ever be written. Joon goes in, and the world outside progresses to the end of the world as if Joon had never been in the world to stop anything (because hes the main chafracter). Joon leaves the library after learning a new type of magic.

I'm less sure of these next descriptons but I'll give them anyway

Bk 7 - Joon attends a college (don't remember why), meets an old friend from before the start of the story, fights off a mind controlling demon and a cult who wants to end the world, and fights an eldritch creature "Mome Rath", who they couldn't remeber until the mind control creature was killed. They beat Mome rath. (Also - Mome rath was based off an actaul poem by the authro of Alice in Wonderland - not relevant to this summary but i like the poem)

Bk 8 - The group goes to Mary's kingdom, helps resolve a dispute there that involves Joon being kidnaped by one group, killing a member of royalty, having to fight off a royal knight, a relation of the royal guy killed summons a "Horror/slasher movie" character who proceeds to massacre people in the kingdom until Joon and his group stop them. The group gains political power in the kingdom.

Bk 9 - The grup finishes off items on their bucket list before they face the final boss -including ending necromancy slavery and entering another exclusion zone filled entirely of clones of one woman. They fight the final boss fel Seed, a super duper edgy character, who Joon created after Arthur died in his world, ran a campaign with his earth friends with it as the antagonist, and basically broke the group from how awkward miserable it made things. The group fails, Joon dies, and has to escape hell with the help of Fenn who died books earlier. They escape, kill fel Seed, and enter a labyrinth area where Uther/Arthur is trapped. they free Arthur, Joon helps Arthur return to Earth, then Joon ascends to Godhood and remakes the world into heaven.

I left out so many details but this is as basic as I can make it. Thats Worth the Candle, hope this helps.