This series, “What Everyone Needs to Know,” typically over-achieves that goal; there’s far more in this volumes than what “everyone” needs. These are (this is my 2nd, I read the volume on “Yemen” last year) thorough introductions with plenty of depth. The problem with “Hoarding” wasn’t content, there’s quite a bit, but a certain repetitive nature to it as it focused on treatments of hoarding disorder at various levels and on the limited or inadequate research that’s been done. But that technique drives the points home! Also, this not a book of practical ways to address hoarding, though it does offer some tips when addressing the person with the challenge. And it has plenty of resources in the reference section. Worth a read if you or someone you know might have over-acquisitive behaviors, or an inability to part with clutter, or is adversely affected by the sheer amount of stuff in their lives.