¡Hola Ignacio!

Should i just print the text and see

That sounds like a very good idea to me. Look (and read !), and you’ll see.

the space between the letter
Do you mean between the words? They should be even, not too tight and not too wide (most often, the latter is the problem).

Or are you talking about the spaces between the letters? When working with a good font (that is in this case, a font with well-done spacing and kerning), there usually is no need to mess around with that.

I’m using Garamond

Which one? There are thousands!

F

hi, thanks for your fast answer!,

excuse me, i was talking about the space between words in a line, not betwenn two letters...you are right.
i´m working with garamond regular(i dont know exactly which one...sorry) and the question was about the tracking; in InDesign i used 25 pt. for the tracking and after two prints i´ve noticed that it was toooo much space between two words and that´s because i reduced it to 0. But now i´m not sure about it and i ask me if there is some special rules about the kerning for text in books, or if the typographer has to check the text and decide, how long should be the space.
I mean, it sounds maybe stupid, that i don´t know such things but i´ve read in somebook, that there is some information about the tracking for each type and i would like to know more about it.

thanks again!!!

Normally you will use tracking at 0 for text. Places where you might use tracking include when using small caps for folios or headings set entirely in true small caps, for instance. In display settings you might want to use a small amount of negative tracking.

Normally you will use tracking at 0 for text.

I have to disagree with you there. At text sizes Indesign sets type a little uncomfortable much of the time, and serif faces usually need five to ten units of tracking to get some nice color, whereas serifs need similar amounts of negative tracking. If you get really lucky a designer will even suggest tracking values in the specimens/manuals for fonts, as Sumner Stone does. Erik Spiekermann explained it in a little more detail a while back.

Erik Spiekermann explained it in a little more detail a while back.

Do you refer to this?

Text is usually set too tightly and with too big a wordspace. One of the legacies of Quark Xpress. Always set the optimum wordspace (under H&J) to 80% or less in unjustified setting. And increase tracking by at least 2 units (that’ll be 10 in InDesign) for sizes under 12 pt. If that makes the copy run too long, simply decrease the size by 0.1 or 0.2 pt. That actually increases space between lines (aka leading) and by giving the type a little more room to breathe, makes
a more legible even though it’s a little smaller.
Don’t open tracking for my new typeface, FF Unit, as i have designed it to be generous at small sizes.

To me, the last sentence is the most important one.
Use good fonts, and you don’t have to fiddle around (a lot). This totally depends on the font, the size, the medium and the application (ES doesn’t explicitly name those applications just for the fun of it).
And no, FF Unit is not the only font that has been made with caution.

Keep in mind that this has been written in 2004 – some things have changed since then, fortunately – a lot of superb text fonts (i.e. fonts, not typefaces) are quite young (yes, we are spoiled OpenType kiddies, aren’t we?).

Have a look at this sample:
Two optical sizes of Garamond Premier Pro, by Robert Slimbach/Adobe: