The journal is pretty neat. Though it is half-scientific fact vs. possible gene splicing and half-Dr. Sorkin vs. John Hammond. The only thing I didn't like about the game is that, if you take everything at face value and not think of what's likely happening behind the scenes at InGen, it casts Hammond in a very unflattering light that's more suited to the novel's version of Hammond.
"Geez, we've been back together for five minutes Doc, and you're already talking about the end of the universe."
"Stupid, stupid rat creatures!"