I like the Mass Effect games enough that I'd probably buy most DLC associated with it. Buying toys and books for that game content is a line I will not cross.
I feel like Dietz bumping Gillian from 16 to 18 is going to end up done so she can have sex with someone, or be an LI in ME3. The worst thing is 2 bioware heads read and approved the text (including Casey Hudson!)
You would think that when the market for books like these are rabid fans that care about the details and story, it's important to get those right...