Is the book "Bioinformatics for Geneticists" outdated?
I haven't read through all of it, but from the second edition, which I found available online here, it seems to me that it might be a good introduction, but (as expected from the publishing date) it is really missing out on all the next generation sequencing stuff. Which is important, not only because it is my favourite field.

I am not sure what you want to get from it? You say you have little genomics background, but then you got a book that expects you to know the genetics, but explains the bioinformatics.
There's a basic description of the background of sequencing at the NIH website, maybe that helps.