Hi Jeff, and welcome back to Just Answer.
I think the easiest thing to add to your already existing books (or to transform completely to a different type of store) would be a variety of gift items and perhaps discounted greeting cards. The gift items can range in price from basically novelty items, to more expensive and sophisticated gifts for men, women, children and babies. For example, unique stuffed animals, picture frames for all occasions, beaded bracelets and necklaces and even, if your wife is so inclined, gift baskets with coffees, teas, non-perishable food items, 'spa' accessories for both men and women (lotions, soaps, bath beads, shower gels, loofahs, etc.) and at appropriate times, holiday themed baskets. Most of these gift items can be ordered from wholesale distributors or directly from China, where it's less expensive to order in bulk.
I have such a store in my neighborhood and it does very well. Many people typically need to 'grab' a fast gift on the way to a celebratory event, party, etc., and if there's a nice variety in your store, they will always be able to find something appropriate for the recipient. You can offer gift wrapping, too.
I wish you and your wife much good luck with the store!
If you need additional information, please let me know by clicking 'Reply
If you have found this answer helpful, please click 'ACCEPT', as this is the only way I am compensated for assisting you today (although you have made a deposit/have a subscription, no payment is released to the Expert until you click 'Accept').
Positive Feedback and Bonuses are always welcomed and appreciated.