その歴史小説は権謀術策に満ちている。
That historical novel is full of intrigue and trickery.
策略 is a general term for a strategy or scheme, while 権謀術策 specifically implies cunning, deceitful political maneuvering.
謀略 also means trickery or plot, but 権謀術策 emphasizes a broader, more systematic use of power and deception.
A yojijukugo combining 権 (power), 謀 (plot), 術 (technique), and 策 (plan). The exact historical origin is uncertain, but it is used to describe elaborate, cunning strategies.