It seems to me that more book series now are using a matching style for the individual volumes. Here are two relatively recent series:
Chronicles of Ancient Darkness, Michelle Paver
Wolf Brother
Spirit Walker
Soul Eater
Outcast
Oath Breaker
Ghost Hunter
A Song of Ice and Fire, George R R Martin
A Game of Thrones
A Clash of Kings
A Storm of Swords
A Feast for Crows
A Dance with Dragons
The Winds of Winter
A Dream of Spring
Contrast this with two well-known classic series, where no effort has been made to tie the titles together:
The Chronicles of Narnia, C S Lewis
The Lion the Witch and the Wardrobe
Prince Caspian
The Voyage of the Dawn Treader
The Silver Chair
A Horse and his Boy
The Magician’s Nephew
The Last Battle
The Dark is Rising Sequence, Susan Cooper
Over Sea, Under Stone
The Dark is Rising
Greenwitch
The Grey King
Silver on the Tree
This isn't hard and fast -- many new series don't, and a few older series do -- but it does seem to have become more common. I'm assuming this is a marketing thing. But does it actually work, or does the practice risk making the author/publisher choose from a narrower range of options, ending up with less attractive titles? You wouldn't expect a book to have aligned chapter titles, after all.
In the above examples, I much prefer the variety of the older ones. The risk of using a formula is that it seems formulaic. But is this outweighed by there being a firmer sense of the series as a whole?
Chronicles of Ancient Darkness, Michelle Paver
Wolf Brother
Spirit Walker
Soul Eater
Outcast
Oath Breaker
Ghost Hunter
A Song of Ice and Fire, George R R Martin
A Game of Thrones
A Clash of Kings
A Storm of Swords
A Feast for Crows
A Dance with Dragons
The Winds of Winter
A Dream of Spring
Contrast this with two well-known classic series, where no effort has been made to tie the titles together:
The Chronicles of Narnia, C S Lewis
The Lion the Witch and the Wardrobe
Prince Caspian
The Voyage of the Dawn Treader
The Silver Chair
A Horse and his Boy
The Magician’s Nephew
The Last Battle
The Dark is Rising Sequence, Susan Cooper
Over Sea, Under Stone
The Dark is Rising
Greenwitch
The Grey King
Silver on the Tree
This isn't hard and fast -- many new series don't, and a few older series do -- but it does seem to have become more common. I'm assuming this is a marketing thing. But does it actually work, or does the practice risk making the author/publisher choose from a narrower range of options, ending up with less attractive titles? You wouldn't expect a book to have aligned chapter titles, after all.
In the above examples, I much prefer the variety of the older ones. The risk of using a formula is that it seems formulaic. But is this outweighed by there being a firmer sense of the series as a whole?