Secret Weapon is the 7th book in the Last of the Jedi

Star Wars: The Last of the Jedi

The Last of the Jedi is a series of young adult books written by Jude Watson, begun in 2005. The series is set in the fictional Star Wars Expanded Universe, in the time period between the end of Star Wars Episode III: Revenge of the Sith and a few years prior to Star Wars Episode IV: A New Hope...

series. It is written by Jude Watson

Jude Watson

Judy Blundell, better known by her pseudonym Jude Watson, is an American novelist for young readers. Her book What I Saw and How I Lied won the National Book Award for Young People's Literature in 2008...

, and distributed by Scholastic.

Summary

It begins on the planet Bellassa, where parts of a secret weapon is being built by the Galactic Empire

Galactic Empire (Star Wars)

The Galactic Empire is one of the main factions in the fictional universe of Star Wars. It is a galaxy-spanning regime established by the series' lead villain, Palpatine, to replace the Galactic Republic in Star Wars Episode III: Revenge of the Sith. The Galactic Empire is introduced in Star Wars...

, with Darth Vader

Darth Vader

Darth Vader is a central character in the Star Wars saga, appearing as one of the main antagonists in the original trilogy and as the main protagonist in the prequel trilogy....

 and Grand Moff Tarkin

Grand Moff Tarkin

Governor Wilhuff Tarkin or Grand Moff Wilhuff Tarkin is a fictional character in the Star Wars universe, appearing as the main antagonist of Star Wars Episode IV: A New Hope, played by British actor Peter Cushing. A younger version of the character makes a brief cameo in the prequel film Star Wars...

 overlooking the process to make sure that it remains secret. They are also joined by Ferus Olin, a former Jedi

Jedi

The Jedi are characters in the Star Wars universe and the series's main protagonists. The Jedi use a power called the Force and weapons called lightsabers, which emit a controlled energy flow in the shape of a sword, in order to serve and protect the Republic and the galaxy at large from conflict...

 apprentice and rebel leader. Ferus joins the dark side in the same way Anakin was seduced by the dark side, and Palpatine

Palpatine

Palpatine is a fictional character and the main antagonist of the Star Wars saga, portrayed by Ian McDiarmid in the feature films.Palpatine first appeared as the unnamed Emperor of the Galactic Empire in the 1980 film Star Wars Episode V: The Empire Strikes Back...

promises to give him the power over life and death.