YA Series Books Worth Reading

It seems like these days, when a young adult book is published, chances are that it will be the first book in a series. Even books that seem like they won't be part of a series end up as a series or as having companion novels (Nantucket Blue, for example). With all the series that come out, it can be hard to decide what to read. Should I read a trilogy, like The Hunger Games, since I'm only committing to three books, or do I want to take the plunge and read a longer series, like Pretty Little Liars, and commit to sixteen books?

To help, I've narrowed the field down to my favorite YA series books--the must-read books out of all the YA series. Since there are plenty of YA series that I haven't read but that are popular, I'm also including a list of the series books I most want to read but haven't gotten to yet. In both categories, I'm skipping Twilight, The Hunger Games, and Divergent, and focusing instead on series that are popular, but maybe not as popular.

Must-Read YA Series

The Chemical Garden trilogy by Lauren DeStefano

• Wither
• Fever
• Sever

The Iron Fey by Julie Kagawa

• The Iron King
• The Iron Daughter
• The Iron Queen
• The Iron Knight

Ruby Oliver by E. Lockhart

• The Boyfriend List: 15 Guys, 11 Shrink Appointments, 4 Ceramic Frogs and Me, Ruby Oliver
• The Boy Book: A Study of Habits and Behaviors, Plus Techniques for Taming Them
• The Treasure Map of Boys: Noel, Jackson, Finn, Hutch, Gideon--and Me, Ruby Oliver
• Real Live Boyfriends: Yes. Boyfriends, Plural. If My Life Weren't Complicated, I Wouldn't Be Ruby Oliver

Jasper Dent by Barry Lyga

• I Hunt Killers
• Game
• Blood of My Blood

Delirium by Lauren Oliver

• Delirium
• Pandemonium
• Requiem

The Lying Game by Sara Shepard

• The First Lie (novella; #0.5)
• The Lying Game
• Two Truths and a Lie
• Never Have I Have Ever
• Hide and Seek
• Cross My Heart, Hope to Die
• True Lies (novella; #5.5)
• Seven Minutes in Heaven

The Madman's Daughter by Megan Shepherd

• The Madman's Daughter
• Her Dark Curiosity
• A Cold Legacy (expected publication: 2015)

Daughter of Smoke and Bone by Laini Taylor

• Daughter of Smoke and Bone
• Days of Blood and Starlight
• Dreams of Gods and Monsters

Series to Add to Your To-Read List

Graceling Realm by Kristin Cashore

• Graceling
• Fire
• Bitterblue

Burn for Burn by Jenny Han and Siobhan Vivian

• Burn for Burn
• Fire With Fire
• Ashes to Ashes

Defy by Sara B. Larson

• Defy
• Ignite (expected publication: 2015)

Legend by Marie Lu

• Legend
• Prodigy
• Champion

Newsoul by Jodi Meadows

• Incarnate
• Asunder
• Infinite

The Lunar Chronicles by Marissa Meyer

• Cinder
• Scarlet
• Cress

Is there anything you would add to these lists? Anything you would take off the lists? Let us know if the comments!