Grimlock ♥ Ultra Magnus

Irvine, at the very least, understands and respects his material, although hie's pretty much transcribing screenplays.   There's still a lot of ways for that to go sideways, but he never lets things get that out of hand: it's all very true to everything, and while it's a fun, quick read through of the first two movies.   

It just doesn't add anything, much like the Age of Ultron book in this series: both were simplistic versions of the screenplay.   (By simplistic I mean it doesn't use big words, since it's geared towards younger readers.   Or not too big, or doesn't really get into the fact that Tony is an alcoholic, that kind of thing.)

Still, it's fun.  I don't always have access to these movies, and sometimes I want to read in fandom, but don't have adult novelizations.   This is a very, very nice substitute for the adult novels I'd like to have.