Wilco [ tickets ] continues to add cities to its late-summer/early fall tour, which is now set to visit 18 North American cities.

The band is backing its latest album, "A Ghost is Born," which hit stores in June. Wilco co-produced the set with Jim O'Rourke, who engineered the group's previous release, 2002's "Yankee Hotel Foxtrot."

Fans who purchase "A Ghost is Born" can use the CD's enhanced features to access via the band's website a live recording of a recent Wilco [ tickets ] show at Chicago's Vic Theatre.

Joining Wilco's touring band this year are keyboardist/guitarist Pat Sansone (The Autumn Defense) and guitarist Nels Cline. Earlier this year, multi-instrumentalist Leroy Bach, who officially joined the band before the release of 2002's "Yankee Hotel Foxtrot," departed. Programmer/keyboardist Mikael Jorgenson has since taken over Bach's slot.

The only remaining original members of Wilco are frontman/guitarist Jeff Tweedy and bassist John Stirratt. Drummer Glen Kotche replaced Ken Coomer before "Yankee Hotel Foxtrot" was recorded, and multi-instrumentalist Jay Bennett exited after "Yankee Hotel Foxtrot" was completed.

Initially, Wilco planned to play a few summer Lollapalooza shows, but the cancellation of that tour led the Chicago-based group to make other plans.

In April, Wilco called off a planned eight-city tour of North America after it was reported that Tweedy had checked himself into a Chicago rehab clinic for treatment of an addiction to painkillers that he developed while battling migraine headaches.