As much as I respect Neil Gaiman as a person and an author, I actually liked The Silver Dream a bit more than InterWorld. The addition of Mallory seems to have made everything just a bit more lively and approachable. The Silver Dream is faster-paced and slightly less philosophical. That said, I do think it's a really solid sequel, and it doesn't feel like a completely different book, not like the series was picked up by someone completely different.
The plot has plenty of action this time, with more deaths and betrayal and excitement. Joey Harker, who now wants to be taken seriously and called Joe, finds himself at the center of huge plots once again, and both InterWorld and the Altiverse are at risk. All of this comes at a pretty good time for him, though, because he was suffering some serious insecurities with the arrival of a new Walker more powerful than himself, one immediately liked by everyone, unlike him. Joey does get a little bit angsty, but that was also nice, because he showed a bit more emotional depth in this installment than in InterWorld.
Another exciting edition to the series is a character that is neither evil, a multi-dimensional lifeform, or an alternate universe version of Joey Harker (sorry, dude, even I'm not going to call you Joe). Acacia pops into Joey's life and immediately makes things difficult for him, which pretty much is the sign of an awesome girl, right? There's obviously going to be a romance here eventually, but it's totally not schmoopy, and mostly just Joey being embarrassed and blushing, which is fabulous because male characters almost never blush. Take that, gender roles!
What Left Me Wanting More:
Still, though I'm enjoying this series, I still would love for their to be more character development. As a reader, that's what I look for first and foremost. The world building and action here are very fun, but I'm left wanting. The other thing that's getting to me a little bit is the name of one of the big bads: Lord Dogknife. Seriously, if a bad guy of that name killed me, at least I would die laughing at his stupid name.
The Final Verdict:
Readers who enjoyed InterWorld will likely want to continue with this series, despite the loss of Neil Gaiman. If InterWorld was a bit slow for you, you still might want to try this one, because the Reaves made this volume a bit more lively. At this point, I'm not sure if I want to continue with this series (the ending makes it clear more is coming), but I might be ready by the time book three comes out.