This may be a stupid question but I saw the spells and thought they were cool so I bought them. Can anyone tell me what classes can use them because the spell table in the game rules on this site says no class uses them. Can anyone explain?

Wizard

Subclass Chroniturgist can use the Chronurgy spells.

Subclass Graviturgist can use the Graviturgy spells.

Both can use the other Dunamancy spells not tied to a specific subclass.

Dunamancy Spell List

Cantrips

sapping sting (necromancy)

Level 1

gift of alacrity* (divination)

magnify gravity** (transmutation)

Level 2

fortune’s favor (divination)

immovable object** (transmutation)

wristpocket (conjuration, ritual)

Level 3

pulse wave (evocation)

Level 4

gravity sinkhole** (evocation)

Level 5

temporal shunt* (transmutation)

Level 6

gravity fissure** (evocation)

Level 7

tether essence (necromancy)

Level 8

dark star** (evocation)

reality break* (conjuration)

Level 9

ravenous void** (evocation)

time ravage* (necromancy)

* chronurgy spell

** graviturgy spell

Yup, like Cyb3r said, only the two Wizard subclasses from that book can use those spells.