No fuss or hornswogglin' here's the solution. No need to stick around that horrid library.
Really is weird nobody else made a guide for this puzzle, especially since the area its in is annoying.

(Apparently it appears they may have added some RNG, so the library puzzle may NOT be what spawned for you sadly. There's like 3-4 books around you can find that will tell you the answer piece by piece. Sorry. That's all i can help you with if you didn't get this answer.)

I'm sorry. I lied earlier, you actually have to go past that stupid ghost again. You know those big doors you opened that lead back inside the library? Gotta go in there. There will probably be enemies repopulating the area. It's the big hall, there should be a door with a phantom key sticking out of a keyhole signifying where you gotta use that key. it's on the right, after exiting that horrid ghost room.

And your reward? A weapon! .. that uses blue mana. Sorry. Least it deals with skeletons quickly, wastes your mana quickly too.

Enjoy that new book weapon? I honestly recommend just keeping your old loadout handy.

My recommended loadout?

• 1.Big Stick
  
• 2. Magic
  
• 3. Wrist Crossbow
  
• 4. Rock tossing shotty
  
• 5. Explosive brick tosser
  
• 6 Lastly, a healing potion.

Honestly, i'm just playing this game out of pure absolute spite. I'd have refunded it if i could. Having to start from the town every time you load into the game, having to walk long confusing maps to reach other maps if you come back days/weeks/months later. The game even soft locked me in the bogs. Please, leave while you can if you got less than 2 hours.

Made myself dizzy and figured if you've stuck around this long through this cruddy game past its refund window i might as well also hand you the maze solution. (or at least the one that generated for me.)

Figured i'd save you the headache/nausea of sprinting through the same leaves and stone textures several times to figure out whats the right layout.

All that's left for you (sadly) is to find the 2 power crystals inside the maze first. Sorry, can't help you with those. That'll let you mess with the remaining maze layout like in the picture.

There's a shrine to raise your HP and mana levels. (It should be on the same route though as the one i'm sharing, no need to fiddle about unless your REALLY hurting for like 120 gold. Just use this layout.)

Plus, in the screenshot it shows your reward, something that uses those ice shards ammo you saw floating around.