簡單的線條，滿滿的溫馨與惆悵。

白貓原本是孤身一人，有一天來了一隻小黑貓，他們一起吃飯，一起玩耍...

小黑貓一天一天地長大...而白貓一天一天地變老。

有天白貓消失了...剩下黑貓一人。

而黑貓將迎來另一隻小白貓。

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A 2018 Caldecott Honor book

There was a cat 
who lived alone.
Until the day
a new cat came . . .

And so a story of friendship begins, following the two cats through their days, months, and years until one day, the older cat has to go. And he doesn't come back.

This is a poignant story, told in measured text and bold black-and-white illustrations about the act of moving on.