Vurt is pretty awesome.

Vurt by Jeff Noon. Possibly my favorite book. A cyberpunk story based around a drug taken by shoving a feather down your throat, and a search for a lost sister in some form of reality or another. From amazon:
> Vurt is a feather--a drug, a dimension, a dream state, a virtual reality. It comes in many colors: legal Blues for lullaby dreams. Blacks, filled with tenderness and pain, just beyond the law. Pink Pornovurts, doorways to bliss. Silver feathers for techies who know how to remix colors and open new dimensions. And Yellows--the feathers from which there is no escape. The beautiful young Desdemona is trapped in Curious Yellow, the ultimate Metavurt, a feather few have ever seen and fewer still have dared ingest. Her brother Scribble will risk everything to rescue his beloved sister. Helped by his gang, the Stash Riders, hindered by shadowcops, robos, rock and roll dogmen, and his own dread, Scribble searches along the edges of civilization for a feather that, if it exists at all, must be bought with the one thing no sane person would willingly give.

Most of these are very early cyberpunk, the progenitors of the genre if you will. As such I'm not sure if they can be described as necessarily obscure but I don't see many of them mentioned that often (admittedly I'm somewhat new to /r/cyberpunk so you guys might talk about them all the time, in which case please disregard). As a final note not all of these are available on the Kindle market. Nevertheless here's a few that leap to mind -

1. When Gravity Fails by George Alec Effinger which has two sequels if you enjoy it, the third being better than the second imo.
   
   
2. The Ware Tetrology by Rudy Rucker
   
   
3. Islands in the Net by Bruce Sterling. He also edited the early cyberpunk anthology Mirrorshades which is worth checking out along with a several of his other works.
   
   
4. Mindplayers by Pat Cadigan who also wrote a few others worth looking at.
   
   
5. Frontera by Lewis Shiner.
   
   
6. I hesitate to mention this one as it's hardly obscure but if all you have seen is the film which is based off it, it is definitely worth getting Do Androids Dream of Electric Sheep by Philip K Dick.
   
   
7. Vurt by Jeff Noon.
   
   
8. Farewell Horizontal by K W Jeter along with his other novels Glass Hammer and Dr. Adder.
   
   
9. Someone else mentioned Walter Jon Williams novels which I would also highly recommend.
   
   
   
   
   
   

I highly suggest Vurt by Jeff Noon. When anyone ever asks me for a book to read I start them out with this, and for one reason. The book Nymphomation is my favorite novel of all time. But to truly understand all parts of it you need to read Vurt first. I'm not trying to say that Vurt isn't worth reading, I've read it at least 5 times, but Nymphomation is pure pleasure.

I recommend the author Jeff Noon.

Vurt is probably one of the best cross between sci-fi and fantasy. It reads like a cyberpunk Ken Kesey and the Merry Pranksters that takes place in a dream.

I wholly recommend reading it while listening to some dub or IDM music. I played Plaid's song "ManyMe" during the final chapters, and it fit perfectly to the tone of the book. Multimedia mind melding at it's finest.

I like any and all of these! I sadly do not have an iphone, so the case would be no use to me.
The other day I added quite a few wallets to my wishlist, my current wallet is torn to shreds! One of these would be absolutely perfect!
Best thing I've ever purchased on Amazon? This book. It's my absolute favorite. I found it the summer after high school in the local library. It was one of those books that really caught my eye. I didn't think I would get sucked in so fast. It's pretty brilliant.

vurt

Pollen - Jeff Noon

Masterfully written but extremely unusual / fucked up.

Vurt by Noon is better IMO but not quite as fucked up. A completely different reading experience though.

Both highly recommended!