i found a forgotten, complete manuscript

This has never happened to me before, but I was going through Google Docs yesterday and saw a title I didn't recognize. I pulled it up and began to read through it then it started to come back to me. I had written this book many years ago, so many years ago that some of the details are obsolete. But it was complete at almost 70,000 words! 

I'm assuming I put the book aside once I finished it (as I always do) to give myself a break from it. Then I come back later to begin rewrites. I didn't do it in this instance which is puzzling. But I now have another complete book to rewrite/rework. I don't know if it's one I'll start working on anytime soon, but it was definitely a surprise to unearth 70,000 words of writing that occurred, probably ten years ago!