Ollivander laughed. "Well I certainly walked into that one. Let me see." He took out a very old, thick, dusty book from one of the shelves on his side of the counter. "That wand that you have there was made by my late father many years ago, so I'll have to see if he has a record of the core." He started flipping through the pages as he tried his best to answer the other questions. "Wand usage is particular to the witch or wizard - magic will be best performed when you are being yourself. That said, certain spells react to certain motions, but your Charms professor will teach you all of those as you go along. For instance, there are spells that require small flicks of the wand, and spells that require long graceful loops.
"If you are looking for books that aren't on your book list, you need only ask the workers at Flourish & Blotts for higher-level reading in the areas you are interested in. There's no law stating you can't purchase books about your grade level. For general reading however, you might try A History of Magic on the boring but informative side, or The Tales of Beedle the Bard for a more entertaining read. It's full of the sorts of children's stories that wizarding children will have grown up with, rather than Muggleborn children. Ah, here we are," he said, stabbing with his finger at an entry of the ancient record book. "Your wand was created in July 1928 by Gervaise Ollivander - my father - with a string from the heart of a Hebridean Black nine and a half metres long, received from the MacFusty clan on the death of one of their elder hens. That's a female dragon," he added for Tree's benefit, raising his eyes to look at her and then seeing another young lady come in.
"Good morning, Miss Caines," he said with raised eyebrows. "I'll be with you in just a moment." To Tree he said, "For breakfast, I recommend going back to the Leaky Cauldron, as they have the widest variety of foods available. This young lady here might be of more help to you, as she is going into her--" he paused to think, "second year at Hogwarts. She'll have an opinion on what someone your age might like.
"Now then, Brynn, have you come in for a wand care kit? I certainly hope you're taking good care of that wand - hornbeam and dragon heartstring, same as mine, quite rigid, thirty-one and three-quarters centimet----" he cut himself off as he saw the remains of said wand in Brynn's hand. "Well it was thirty-one and three-quarters centimetres. Goodness, what happened to this?" he tut-tutted. "Let me see what we have." He held out a hand to Brynn, even while he saw that Brynn's other hand held another wand he recognised as Brynn's mother's, Erika Caines née Paige, a Hufflepuff, hawthorn and unicorn hair, 30 centimetres exactly. As always, Ollivander remembered every wand he had ever sold.