Usagi Yojimbo by Stan Sakai
Usagi Yojimbo is a samurai who lost his master in battle. He travels around helping towns people and other samurai and fighting bandits assassins and ninjas. Every once in a graphic novel he helps his bounty hunter friend Gen, or fights a demon who thinks he's a god. Usagi Yojimbo is a fun action packed adventure through 17th century Japan. Even my dad has read most of the Usagi Yojimo graphic novels and loves them. Stan Sakai is the bomb.
The Floating Circus by Tracie Vaughn Zimmer
The Floating Circus takes place in Pittsburgh in 1853. Owen lives at an orphanage with his brother Zach. When it's time for adoption Owen runs away and leaves his brother to be adopted alone. Owen runs away to a floating circus on a boat and travels all around the country cleaning stalls for the circus but later he runs into some unexpected problems.
If you like books that give you a history lesson without boring you to death you'll like The Floating Circus.
The Schwa was Here by Neil Schusterman
When Anthony Banano meets a kid named Calvin Schwa his life changes. Schwa is partly invisible. Only four out of five people notice him. Anthony and Calvin start making money off Calvin's partial invisibility, but who ever thought one bet could change your whole life?!
This book is awesomeness. In fact, the only book I can compare it to is one of my favorites series ever: Diary of a Wimpy Kid by Jeff Kinney.