These books are okay if you were a fan of the first one, but if you've read one, you've pretty much got the gist for the series: many bad things will happen, the children will soldier on, and Olaf is a slimy bad guy. I'm mixed about the exposure to new vocabulary. On one hand, it's great that people learn new turns to language and new words; on the other hand, the definitions in these books are often incomplete and humorously narrow, and students get absolutely no practice in figuring out words by context, which is a very important skill. I have to admit, though, that they serve a purpose: students who are reluctant to read can often be tempted with a silly and predictable series (they can trust that the language won't be a huge struggle), so this is a great choice for such cases. Also, one of my students who finds the Harry Potter books just a little too creepy finds the unrealistic, outrageously tragic Snicket books much more to his taste.