My wife has taken a shine to Dust (Sooraya Qadir a member of the x-men), and has said she'd like to get into comics by reading about her.

I'm trying to find all the collected editions she appears in, to get for my wife but I'm having difficulty tracking them down.

I've found this list:

Trade Paperback Listing

New X-Men: X-Posed

New X-Men: Hellions

X-Men: The 198 (in Mutant Database)

New X-Men: Childhood's End

New X-Men: Childhood's End 2

New X-Men: Childhood's End 3 - Nimrod

New X-Men: Childhood's End 4 - Mercury Falling

New X-Men: Childhood's End 5 - Quest for Magik

World War Hulk: X-Men

X-Men: Blinded by the Light

Astonishing X-Men: Unstoppable

X-Men: Messiah CompleX

X-Men: Divided We Stand (flashback)

Young X-Men: Final Genesis

X-Men: Secret Invasion

Young X-Men: Books of Revelations

Avengers*X-Men: Utopia

I can't figure out which of these show enough of the character to hold my wife's attention (which is currently centred around Dust, not Marvel or even the X-Men).

In which of the above TPBs is Dust a significant character?

For the purposes of this, lets say significant means that she appears on at least three pages in at least two different scenes.