For crime, Walter Mosley. For pure reading candy, Patrick O'Brian--beginning with Master and Commander.

Any story by Sharon Draper, especially Tears of a Tiger.  This book has huge appeal, especially to teenage boys, and it is a very high-interest book, especially for reluctant readers.  I have had been able to get students to read her books when all other books and series failed.

TheNoughts and Crossesseries by Malorie Blackman may appeal to your sense of adventure. The short stories of Ambrose Bierce also contain the mystery element you will appreciate.

As a 14 year old, I was busy reading my DC and Marvel comic books and Mad Magazine, but I still had time for the classics. Treasure Island and The Adventures of Tom Sawyer are essential reading for young teen boys, and (since there is an interest in vampires) Edgar Allan Poe short stories might be a good fit.

I would highly recommend the Hunger Games trilogy.  I am not 14 anymore, but the book is written from the perspective of a teenager, and I would imagine it would be even more powerful if I was reading it as a teenager and not an adult.  I teach middle school and most of my kids loved the books.  Additionally I would recommend the Percy Jackson books, starting with The Lightning Thief.  Again, it is written from a middle school vantage point, and it is a very exciting series.

In response to #2. It's funny, but I thought of Sherlock Holmes, Edgar Allan Poe, Agatha Christie (especially And Then There Were None), and Stephen King too. Some other things that have occurred to me are:

Night Has a Thousand Eyes by Cornell Woolrich

More Than Human by Theodore Sturgeon

The Short Stories of Theodore Sturgeon

Call of the Wild by Jack London

Oh, to be fourteen again!

My son loves The Chronicles of Vladamir Tod. As well, he loves reading Stephen King (all of them). Another great author is Walter Dean Meyers. That said, Twisted, by Laurie Halse Anderson, is another great text for boys.

The Sherlock Holmes books seem like a good idea to me too, and the stories of Edgar Allen Poe come to mind as well. This could be a good time to read The Lord of the Rings trilogy, books which have suspense, monsters, valour and adventure and which were written with the 14-18 year old reader in mind.

Then there are the classic mystery novels of Agatha Christie...and the books of Stephen King. For summer reading, I would be looking for entertainment and quality, so I wouldn't feel bad dipping into some King-style popular fiction, or maybe even Dan Brown if that strikes your fancy.