Uncommon · Tier II · Base game

Pile of Books

% Crit ChanceEngineering

Structured effects, restated

What one copy changes

+5% Crit Chance +2 more declared effects, listed below

Structures Can Crit

Changes Structures Can Crit by +1.

The recorded ownership limit is one copy.

% Crit Chance

Changes Crit Chance by +5 percentage points.

The recorded ownership limit is one copy.

Engineering

Changes Engineering by +3 points.

The recorded ownership limit is one copy.

Stat references: % Crit Chance · Engineering

Purchase-time direct weapon metric

Your before-and-after DPS

Weapon Tier

Current player state

Enter your current values before buying Pile of Books. Fields start at the game’s own default stat block, where every stat but Max HP starts at zero — a 0 here is that default, not an empty field. Player stats use the same device-local values as the weapon pages.

% Attack Speed % Crit Chanceitem input or output % Crit Damage % Damage % Dodge % Life Steal % Speed Armor Curse Elemental Damage Engineeringitem input or output Harvesting Luck Max HP Melee Damage Player Level Range Ranged Damage Equipped Weaponstiming context

Using Max HP 10 · 1 equipped weapon

Chain Gun goes from 65.48 to 169.03 expected primary-target DPS.

Direct DPS change +103.55 DPS +158.1%

What the comparison includes

Both sides use the shared expected primary-target, pre-mitigation direct-DPS engine. The after side adds fixed global-stat changes and the declared count/stat-scaled changes shown on this page. It includes staged damage rounding, crit expectation, projectile count, shooting duration, and steady-state mean cooldown.

It excludes enemy armor, target density, positioning, misses, overkill, burning, explosions, spawned attacks, temporary effects without a fixed duration state, conditional procs, target debuffs, and weapon-scripted damage changes. A displayed zero therefore means zero within this stated direct metric, not zero value in every combat situation.

Zero-stat baseline, highest available tier

Largest computed direct-DPS changes

Chain GunRanged · Tier IV 65.48 → 169.03 +103.55 DPS (+158.1%)
ExcaliburMelee · Tier IV 380.86 → 405.70 +24.84 DPS (+6.5%)
DrillMelee · Tier IV 38.85 → 53.28 +14.43 DPS (+37.1%)
Gatling LaserRanged · Tier IV 163.64 → 177.27 +13.64 DPS (+8.3%)
ScytheMelee · Tier IV 215.22 → 225.67 +10.45 DPS (+4.9%)

Availability and ownership fields

Purchase facts

Rarity: Uncommon · Tier II
Price position: 65–69 lowest of 72 in this rarity
Ownership: Recorded ownership limit: 1 copy.
Shop lock: Can be locked in the shop
Crates: Included in normal crate eligibility
Unlock: Unlocked by default
Content: Base game
Curse field: Not a cursed item

Same rarity, adjacent shop price

Priced next to Pile of Books in Uncommon

The Uncommon items either side of Pile of Books in the same price order its rank above is measured in — what the shop is really offering you instead at this price.

Medal — 55 materials (cheaper)
Eyes Surgery — 60 materials (same price)
Pearl — 60 materials (same price)
Ritual — 60 materials (same price)
Small Magazine — 60 materials (same price)
Tyler — 62 materials (dearer)

Offer and resolved-stat relationships

Character-specific relationships

Wanted-tag matches

Builder — matches Engineering; wanted-tag filter chance 5%
Crazy — matches Crit Chance; wanted-tag filter chance 5%
Diver — matches Crit Chance; wanted-tag filter chance 5%
Dwarf — matches Engineering; wanted-tag filter chance 5%
Engineer — matches Engineering; wanted-tag filter chance 5%
Hunter — matches Crit Chance; wanted-tag filter chance 5%
Technomage — matches Engineering; wanted-tag filter chance 5%