Which Cuboards Which

My Madrina bought this book for me on a bonding vacation.  It's a very good book even though it doesn't look like it.  It's about a boy named Henry and he go's to Kansas because his parents are divorced, and are going to court over him so he's living with his aunt, uncle, and cousins.... then one day he finds under the plaster in his room are 100 cupboards (hence the name).  Then he finds they're not ordinary cupboards, but portals to other worlds except for one witch, when you turn the knobs let you venture into the worlds.  But are they ALL safe? What will happen in them? I am definitely reading the rest of this series!!!