letter-spacing: normal | <length> | inherit

• Defines additional spacing between letters of a word
• Negative values are allowed

p  { letter-spacing: 0.4em }
p { letter-spacing: -0.05em }
p { letter-spacing: normal }
p { letter-spacing:-1.5em;margin-left:480pt }

Letter spacing is 0.4em
Letter spacing is -0.05em
Letter spacing is normal
Letter spacing is -1.5em

Firefox, Chrome, Safari implements OK; Opera and IE8 do not. Four examples above.

Children inherit parent's value

0.6em added even for the em text