with "ok computer" (released in 1997), the band started the next section of their career. they started using more sounds from electronic music. they released the album "kid a" (released in 2000, was initially going to release sometime in late 1999) which had a lot less use of guitar than on previous albums, but was still called one of their best albums (with some people calling it their best). an album of songs recorded during this time, but that did not appear on "kid a" was released, called "amnesiac" (released in 2001). in 2003 they released the album "hail to the thief" which was a return to a sound with more guitars and less use of electronic sounds. in 2007 they released "in rainbows". it was first released for free on the band's website, then released properly on january 1, 2008. the album was delayed two times. it was going to be released in late 2005, then it was going to be released sometime in 2006, before finally being released in 2007.