Maintenance IV: "Maintaining High Grade Tools" is a skill book item in Project Zomboid. It trains Maintenance for levels 7–8 and has 340 pages. Build 42.21 data, November 2026.
Skill Book Books & media
It trains Maintenance for levels 7–8 and has 340 pages. It weighs 1.
Skill books multiply the experience you earn in one skill for a band of levels, so read the volume that matches your level before training. Other literature eases boredom and unhappiness, and magazines and schematics teach recipes.
More: Skill books and reading · Every skill.
Use the item ID in sandbox loot settings, admin tools and mods.
| Item ID | Game category |
|---|---|
Base.BookMaintenance4 | Skill Book |
Maintenance IV: "Maintaining High Grade Tools" is on 16 loot tables in the game files. Share is how much of a table's total weight this item takes, before your sandbox loot settings. Each container rolls its table several times, so a bigger share and more rolls both mean you see it more often.
| Loot table | Where that table is used | Share | Rolls |
|---|---|---|---|
| Bookstore Blue Collar | Bookstore (shelves) | 1.8% | 4 |
| Tool Store Books | Garage storage (shelves); Tool Store (cupboard, shelves) | 1.6% | 4 |
| University Library Books | University library (shelves); University storage (shelves) | 1.4% | 4 |
| Bookstore Books | Bookstore (crate, box); Pawnshop (box, shelves) | 0.81% | 4 |
| Library Books | Library (shelves) | 0.63% | 4 |
| Melee Weapons | Survivor safehouse (early) (box, cupboard, crate, …); Survivor cache 1 (cupboard); Survivor cache 2 (cupboard); and 1 more place | 0.38% | 4 |
| Melee Weapons Mid | Survivor safehouse (mid game) (box, cupboard, crate, …) | 0.35% | 4 |
| Melee Weapons Late | Survivor safehouse (late game) (box, cupboard, crate, …) | 0.27% | 4 |
It is on 8 more tables with smaller shares.
On zombies: zombies in these outfits can carry it: Survivalist, Survivalist 02, Survivalist 02 Late, Survivalist 02 Mid, Survivalist 03, Survivalist 03 Late, Survivalist 03 Mid, Survivalist 04 and 7 more.
Inside bags and cases: Military Backpack.
Town by town: loot locations.
Used up as an ingredient in 1 recipe: Pack Set of Books in Box.
Made with:
Used in 1 recipe (as an ingredient or tool):
Where to find it (loot tables with the highest weight first):
It weighs 1 in Build 42.
Base.BookMaintenance4.
It trains Maintenance for levels 7–8.
Stats and item IDs from the Build 42 game data as listed on pzfans.com. Item art is from Project Zomboid.