Books where teens can communicate with the dead

[Joseph]

You might like:
Sparrow Hill Road by Seanan McGuire
Once Dead, Twice Shy by Kim Harrison
Teen Spirit by Francesca Lia Block
The Body Finder by Kimberly Derting
Ghostgirl by Tonya Hurley
Hold Me Closer, Necromancer by Lish McBride
The Dead Kid Detective Agency by Evan Munday
My Soul to Take by Rachel Vincent

[Nairabell]

Anna Dressed in Blood by Kendare Blake is great as is The Name of the Star by Maureen Johnson :)

[Ann aka Iftcan]

While not a teen the Harper Connelly series (3 books, finished series) has this theme. Grave Sight

[Merrilee]

Meg Cabot has the mediator series. It was finished, but she's decided to release another book about the MC when she's a bit older. It's not due out till 2015 though.

[Ingo]

Just had to check it again, the Harper Connely series is 4 books (and, sadly finished), and what I really like about Charlaine Harris is that she writes about more or less normal people, being not rich, rather struggling to make ends meet and also with being special. Highly recommended, although the ending might not be for all (rather, hm, free-spirited).

Meg Cabot's Mediator-Series is on my TBR-List, read the 1-800-missing-Series and liked it very much (also a TV show), so I would second that, also.

And to throw another book-series in the mix, light reading, teen-romance-trouble-with-dead-teens:
The Dead Girls Detective Agency by Suzy Cox, 2 books so far. I reviewed both, and the second one was better due to two twists in the end, but had also a cliff-hanger and the main story was not finished - cannot wait for the third book, but am also a bit miffed, that there was no real end. The first book got 3 stars from me, the second 4.

[Lee Anne]

I've heard A Certain Slant of Light is good.

[Sam~~ we cannot see the moon, and yet the waves still rise~~]

The Lovely Bones
The Five People You Meet in Heaven
The Book Thief (death is the narrator, does that count?)
Elsewhere (takes place in a sort of afterlife)

[Anna]

The Canterville Ghost

[Deborah]

I too recommend the Harper Connely series. Now I need to read them again:) I think I own them...

Graveminder is good

I'm curious about The Caged Graves

[Lirae]

Between
This is one where the main character is dead and finds out about it. Personally, didn't quite like this book since it was very predictable.
But you could see about it.

[Nova]

The Summoning The main character figures out that she can see ghosts/talk to them and is sent to a group home because of it. It's the first book in a pretty good YA supernatural series but to say more would probably be giving spoilers.

Also try Witches' Night OutIt's a YA mystery series about a coven of teen witches and I believe some of the characters have medium/clairvoyant abilities

[Pearl]

Hmmn... My So-Called Afterlife (Afterlife Series) by Tasmyn Murray sounds like it fits your criteria, but it might be a bit too chick lit for your taste.

[Michele]

A Fine and Private Place.

[Claire]

The graveyard book - Neil gaimanThe Graveyard Book

Kelley armstrongs awakening/summoning and reckoning series Kelley Armstrong

[Juels]

The The Ghost and the Goth series by Stacey Kade.

The Ghost and the Goth
Queen of the Dead
Body & Soul

[Lauren]

The Ruby Red Trilogy in Amazing!
Highly Highly Recommend it!
the main girl can see/talk to ghosts but no one else can