I really like your creativity with this. It's a pleasant change from the typical city scapes. I wish I could see the flame on the candle a little better, though. (8)
You have a focus problem here. Let your camera focus as long as your subject is well lit, with a flashlight for example, then switch your light source off and shoot. Some more text in the diary would have been nice. Showing a person writing in the diary would have been even better. 4.
Conceptually, this is an interesting shot. I like the idea of late night writing. Unfortunately, it doesn't convey any sense of possibly being outside (on cloth, it implies being found in a bedroom, the way that it is), which violates the challenge constraints. Also, focus is very soft (intentional? it works ont he pen, but not on the paper), and the blown highlights on the candle combine with the lens flare to really hurt the image. Colors are also a little off, seeming a bit too reddish to me. If this were advanced editing, I would have recommended blending multiple shots to get both the candle and the book. With basic, the most I can recommend is underexposing this, and then dumping contrast and boosting shadows to see if you could get the book back up. Correcting the flare probably requires buying a better lens. If you could have found a tree stump or porch chair to set this on, that might have helped with the "outside" aspect.