Yes, you can find them at a store like Barnes and Noble. If you go to the store you may need to ask them to order the ones you want.
Here are the books:
The Conquering Sword of Conan
The Coming of Conan the Cimmerian
The Bloody Crown of Conan
Bran Mak Morn: The Last King
Kull: King of Antlantis
The Savage Tales of Solomon Kane
Those six books contain every story that I listed in my previous post.
Here is some information for The Scarlet Citadel.
<i>The Scarlet Citadel" was the second Conan story to be printed by Weird Tales magazine and involves an older, wiser Conan as king of Aquilonia. King Conan receives a call for help from Amalrus, the ruler of neighbouring Ophir, who claims that Stradabonus, the king of Koth, is threatening his border.
When Conan marches to the aid of Amalrus with five thousand Aquilonian knights, the planned campaign is revealed to be a trap as Amalrus and Strabonus are working together to destroy Conan with the assistance of a Kothian wizard named Tsotha-lanti. The Aquilonian knights are cut to pieces and, having been taken prisoner, Conan is imprisoned in a Korshemish dungeon. This dungeon is used by the imperial wizard Tsotha-lanti for nefarious experiments and the story is largely a dark tour of that dungeon as Conan tries to escape.
In the dungeon, Conan frees Pelias, a former rival of Tsotha-lanti, who helps Conan to escape imprisonment and regain the throne of Aquilonia. The story climaxes in a gigantic battle with Tsotha-lanti meeting a grisly fate at the talons of Pelias.</i>
That text was taken from it's wiki-page. Now, in my opinion; I adore this story. Conan faces a classic foe deep within the dungeon. The yarn has a good adventure element to it, and is classic purple prose.
Also, here is a painting by Frank Frazetta for the story:
Kings of the Night is about Bran Mak Morn the Pictish King during the dawn of the Roman Empire.
We are let known, that Bran and his people are the descendants of the savage Picts during Conan's time. Also the yarn explores how Bran Mak Morn is the descendant of Brule the Spear-Slayer (Who was friend and comrade to Kull thousands of years before.)
Here is a painting of Bran Mak Morn:
It's been a long time since I have read the Solomon Kane tales, and I can't remember that much about Wings in the Night. But, this is from Wikipedia.
<i>First published in Weird Tales, July 1932. In Africa again, Kane comes across an entire village wiped out, and all of the roofs have been ripped off, as if by something was trying to get inside from above.</i>
Here is a painting of Solomon Kane:
Also, I would not mind seeing Jerry Bruckheimer direct a Conan movie, but I would still rather see Peter Jackson do it. I think Jackson would handle the subject matter better. In all of Howard's Conan tales there is one main theme and that is that barbarianism is the natural state of mankind, and that barbarianism will always triumph over civilization. The civilized world is in truth more dirty, and back-stabbing then savagery, and that the political rulers are more corrupt than any barbarian.
I think Jackson could handle that better.
Now, I would like to see Bruckheimer direct a Dragon Lance movie!