Blade of vengeance is the one where i had the most fun... The fazzlewood is the most known...

If you don't mind doing the conversion work, the Wyvern's Claw d20 adventures for thieves were quite good (assuming that she wants to play a thief).  Unfortunately I can't find them on RPGnow or DriveThruRPG now.  

Another series to consider are the XRP solo modules (again requiring conversion):  http://www.lulu.com/spotlight/josephbrowning

Hi, White Fang in Dungeon magazine issue 20 may be worth a look. A solo adventure for a 10th level human thief.  Good luck have fun

Agent Cooper wrote in Any good 1 to 1 Adventures?:The Gem and the Staff is fun, if she likes to play a thief.

+1

~throwi

aia wrote in Any good 1 to 1 Adventures?:

Agent Cooper wrote in Any good 1 to 1 Adventures?:The Gem and the Staff is fun, if she likes to play a thief.

Ok but the first part is Fazzlewood,  isnt it?

Actually yes.  At least sort of---the Acaeum entry says it's based on the original Fazzlewood tournament module.  Never noticed that.  

Ran my brother's thief through it back in the day, we had alot of fun with it.

Boring Anecdotal story:  This mod has a dear place in my heart because it was a christmas gift from our older sister back when we were kids.  She did not like anything about D&D, wanted nothing to do with it and refused to play with us.  So we were shocked when she presented this mod to us.  When we asked her how she knew to get this particualar module, when she knew nothing about the game.  (It was perfect, as my brother loved playing thieves and was in fact running a 9th level thief at the time)  She confessed that a few weeks prior she was secretly eavesdropping on our games so she would know what to get.  She's a good egg, my sis.