Resumen: The last time it appeared people thought they'd be gassed! The next time it appears you'll be seventy-six years older! Right now it's hurtling back into our skies after around three-quarters of a century out in the frozen depths of space!
It is, of course, Halley's Comet and this book explains:
What it is
When and where it can best be seen
Who Edmond Halley was
And why you just MUST NOT miss it!