Into the Demon Plane!!

Itsuki locks the others away in a separate dimension so Yusuke and Sensui can fight undisturbed. Under intense pressure, Sensui's real personality, suppressed for so long, starts to come out. Then Koenma shows up and things really start to get hot, forcing Yusuke to resort to desperate measures to draw their enemies out.Kuwabara and the rest of the crew escape Itsuki's clutches and plunge into the Demon Plane after Sensui.

...

"Koko's always got a new project cooking, even though they usually end in total disaster. This time will be different, Koko promises herself. This time, she's decided to Be Good. But how can a girl whose greatest talent is causing trouble get her act cleaned up? If she's being honest with herself, Koko isn't even sure what 'being good' means. Jon knows what being good means, and that's why he's going to Peru to support his girlfriend's humanitarian...

"The latest illustrated novel from Lincoln Peirce is a laugh-out-loud must-read starring the one and only cartooning genius, king of detention, and Cheez Doodle connoisseur, Nate Wright. Nate's not having the best of luck . . . in fact, he's not having ANY luck. But with a little boost thanks to Chad's lucky foot, suddenly good luck is everywhere Nate turns! Nate's in the zone! But how long will it last?" --

A collection of seven tales featuring the adventures of Sardine and her lovable uncle Yellow Shoulder as they face off against the evil galactic dictator Supermuscleman.