ReadEdenCompleted fantasy series: how many volumes do you want?
Choose the commitment before the world
A finished series removes one uncertainty: the ending already exists. It does not tell you whether you want three books or fourteen. Counting volumes first is not unromantic. It helps you choose a journey that fits the time and attention you actually have.
Three or four volumes
Brandon Sanderson's first Mistborn era and Brian McClellan's Powder Mage trilogy each offer three-volume routes. Jarosław Grzędowicz's four-volume Lord of the Ice Garden is a Polish series with English editions available for part of the cycle, so check availability in your market before committing.
Six or seven books
Ursula K. Le Guin's Earthsea sequence reaches six books and changes form and perspective as it grows. Stephen King's Dark Tower has seven core volumes, with The Wind Through the Keyhole published later as a story set along the road.
Ten volumes and beyond
Steven Erikson's ten-book Malazan Book of the Fallen and Robert Jordan's fourteen-volume Wheel of Time ask for a different kind of reading life. Choose them when returning to the same world for months sounds inviting, not merely impressive.