The first volume of A Certain Magical Index and the second volume of Accel World have recently been released by Yen Press. They are available in paperback, and can be purchased online.

A Certain Magical Index vol 1: Amazon — Barnes and Noble — Book Depository

Accel World vol 2: Amazon — Barnes and Noble — Book Depository

A Certain Magical Index vol 1 Synopsis:
A certain unlikely hero… Touma Kamijou has the worst luck imaginable… Sure he’s a citizen of Academy City, a scientific marvel of the modern world where superhuman abilities are artificially cultivated and commonplace, but when it comes to paranormal talent, Kamijou’s been classified a Level Zero-a loser, basically. Oh, he does have one trick up his sleeve (literally), but even that’s more trouble than it’s worth. When Kamijou encounters a delusional young girl convinced she’s a nun and raving about being chased by evil sorcerers, he’s eager to send her on her way and get back to failing his studies. Fate, it would seem though, has other ideas, and he suddenly finds himself caught up in a supernatural intrigue with a girl named “Index” at the center! Science and magic collide in this first volume of one of the most popular light novel series ever penned!

Accel World vol 2 Synopsis:
Since meeting Kuroyukihime, Haruyuki has managed to grow up a bit. But suddenly this mature Haruyuki is confronted by Tomoko, an elementary school girl he’s never met before–who calls him “big brother”?! When Kuroyukihime sees the two of them flirting, the look she gives Haruyuki is like a cold knife stabbing him in the gut! Meanwhile, in the Accelerated World, something very mysterious is taking place… A cursed piece of Enhanced Armament called the Armor of Catastrophe is making the rounds, polluting the minds of the duel avatars that don it and causing those avatars to attack at random with no regard for friend or foe. Only Silver Crow, the sole duel avatar with the power of flight, can apprehend the relic. Is Haruyuki up to the challenge on this mission to subjugate the Armor?!