Philomen loved his family, but he admit that one of the best things about them is that it was very easy to shop for gifts for them. It was one of the perks of coming from an academic family--birthdays, Christmas, it didn't matter, he was buying them books, and expected books in return. The only real issue was finding books they hadn't already read.
He was currently perusing Flourish and Blotts' astronomy section for Christmas presents for his parents and for Cleander. For someone who didn't have a specific interest in the subject himself, he probably knew about about it than the average layperson, just via osmosis. That didn't make it any easier to find books for his family, though. That just made him more indecisive.
"Have you read this book?" Philomen asked another shopper, holding up the book that he was currently considering. If all else failed, get a second opinion, he supposed.