Helena laughed, a gleam in her eyes. "It is quite complicated, so you are probably best not hearing the technical explanation. I do have quite the habit of getting carried away with explanations when I have personally built them." Which wasn't far from the truth. Helena was known to go on long-winded overly scientifically detailed descriptions of how her devices worked when prompted in the right way. It wasn't that she thought Robin wasn't intelligent, it was more the difference in the times they were from. She expected he didn't yet have a solid grip of current scientific theories, and she didn't want to confuse the poor man.
And yet again at his question of if her books were in the library, a proud smile curved her lips. And when he said he'd like to read them, Helena could not hold back a little squeak of excitement. Robin Hood wanted to read her books! She currently felt the exact same as when her father had gifted her with a chemistry set for her thirteenth birthday. "Yes, my books are in the library. You would find them under the name H. G. Wells in the fiction section." And there was another squeak of excitement. Apparently she was now a twelve year old fangirl.
When Robin held the door open, she smiled and gave him a nod of thanks as she stepped inside the cafe. By now, she'd managed to regain her composure enough to return to an adult state of mind. "Would you like an overview of what drinks they have and what they are like?"