Hardly easy.

Aimee walked into the library and sat at a table in a corner, she put her bag carefully on the floor and riffled through it. She frowned, thinking she'd left her little book in her dorm. She smiled, there it was. In a pocket. How stupid? Forgetting where I put it. She thought to herself.
She settled into the chair and flicked through it, reaching a fresh page, she also pulled a piece of parchment and a quill and ink well out of her bag.
She read through the parchment a couple of times. Looking at the wall, she frowned. Her mother had sent it to her, knowing how much she loved to do these puzzles. But this one... It was the hardest Aimee had come across. She scribbled in the book for a few minutes, then crossed it out. She frowned. The solution seemed easy at 1st glance but after a few days working on it, she knew it wasn't what it looked like. She had to dulve a bit deeper. She stared at the wall across from her, frowning still. She made a few more notes, again crossing them out.
She looked up, seeing someone come towards her, she quickly shoved the parchment into the book and closed itt.