To use this Secret Castle DIY Book Nook Kit, first, unpack all the pieces carefully. Start by assembling the ground - floor bookshelf and place the lighting elements as shown in the instructions. Then, build the second - floor bedroom and restroom. You can add your own decorative touches like small figurines or extra wall art. When handling the lighting, be gentle to avoid damaging the bulbs. After assembly, place your book nook in a dry and stable location. To maintain it, dust it regularly with a soft cloth. If any parts get dirty, you can use a mild cleaner and wipe them gently. Have fun creating your unique European castle corner!