linux asm tutorial?

Hello list,
I really want to learn x86 assembly, using nasm.
I found a book online for free, called pcasm but it's pdf.
I haven't been able to get a decent conversion out of it, I tried with adobes 
pdf to html thing and it did it, until it was time to include spaces. 
Everything just looks all run together.
Any ideas of a tutorial and/or a library with sample code I can look at to get 
me going?
Thanks,

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