iPOD questions, for people who have or know about ipods Options

[TYPiKALFEMME]

okay well i am planning to buy a ipod nano; but its b/c my little sister has the 40gb white ipod but i just wanted something simple and plus i dont need that much space for songs. but my questions are:

iPOD NANO
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1.what the heck are audiobooks?
-yes im a beginner at mp3 players-

2. what are podcasts (sp?) ?
--are they radio stations on ur ipod that you have dl? or what? because i thought that you had to get the fm radio thing to put on top of the ipod..but i doubt you can for a ipod nano

3.How do you get the pictures on to the ipod?

4.did anyone buy an ipod nano, is it good or not?

thanks guys, sorry its sounds stupid but i am a beginner @ mp3 players