House of Secrets #3: Clash of the Worlds by Chris Columbus, Ned Vizzini, and Chris Rylander

My name is Brendan, and the Wind Witch has opened a portal to Krystoff's books. The creatures from his imagination will soon invade our world if my sisters and I can't stop the witch, our great grandmother. Once again, the house has dropped us inside Krystoff's creative mind, but this time all of his books have come together as one. We've faced dinosaurs, Nazi soldiers, robots, and blue aliens, but we must still collect three artifacts hidden within the novels to close the portal forever. Unfortunately, this is forcing Cordelia, Eleanor, and I to separate in three directions. Things never work out well when we're apart. I've hooked up with an annoying alien who thinks he knows everything (which he does), but I now find myself trapped by a mummy in a pharaoh's tomb. I hope the girls are having better luck, but I fear their troubles may be even worse than mine.

You should read the previous books in the series first, as this one concludes the trilogy. Clash of the Worlds has a focused quest for the siblings to complete but requires them to separate and travel to different settings. This results in the plot jumping to three different locations and becomes annoying at times. Some of the chapters are fairly short before skipping to a different plot and this makes the book tricky to follow, especially if you don't read it every day. The Wind Witch is still the main antagonist, and she has developed a connection to Cordelia, the oldest sibling. Cordelia is usually the most mature and knowledgeable character, but she's forced to take a backseat to her brother and sister. The witch can see through Cordelia's eyes, so this makes the siblings' planning trickier. The witch also has many hidden allies in the book worlds, so you need to be suspicious of every character the kids meet. Consequently, you can expect surprises, as Brendan and his sisters complete their quests to find the artifacts. The plot builds to a dramatic battle in the climax, so you'll enjoy this excitement. As allies become enemies and enemies become allies, you'll enjoy the conclusion to this three-book adventure!