Niblet和Ralph是兩隻看起來很像的貓，牠們的斑點位置都一樣，只是顏色對調。Niblet喜歡吃洋芋，Ralph喜歡戴上耳機聽音樂。牠們住在同一棟樓，熟悉彼此（唯獨他們的主人都都互相不認識），每天都站在窗邊通電話。有一天，兩貓決定親自碰面聊天。到了對方的家， Niblet當誤認成Ralph ，Ralph被誤認成Niblet。Niblet一直被音強迫聽音樂 ，Ralph一直被餵食，兩隻貓能夠互換回來嗎？順便也把主人也湊在一塊嗎？

Niblet and Ralph may look a lot alike, but they are very different. Niblet loves noshing on crunchy potato chips. Ralph loves putting on headphones and jamming to his favourite records. But both cats have one thing in common: They love being friends and waving to each other from their windows across the courtyard of the apartment building they live in. One day, Niblet and Ralph decide it's time to meet in person (or in cat?). But when they mistakenly end up at each other's apartments, their owners think that Niblet is Ralph, and Ralph is Niblet! Will Niblet and Ralph be able to switch back to their proper homes, or will they be stuck listening to music (ugh) and eating chips (gross) forever? Better still, will they be able to bring their lovable (if not very observant) human families together? With zany humour and bold, bright art, Zachariah OHora creates a purrrfect picture book for kids, adults, and pets of all ages to enjoy.