Don't think reading the book would help you a great deal, Legolas. If I remember, in the book our hero leaves the Morlocks and Eloi to get on with things.
So it won't actually explain what our looney Prof Hartdgen did at the end.
I would also like a set of whatever batteries the librarian had, though he did spoil the adventure aspect of the film, supplying all the answers. Another film with a dose of 'do something to wrap it up quick'.
All in all, this film is a good match for the 1960 version. The effects are better (obviously) and almost match the original scene for scene. And overall it fills some of the unexplained holes in the earlier version, at the expense of opening irritating new ones of its own.
For the record IMDB says:
Based on the classic sci-fi novel by H.G. Wells, "The Time Machine" stars Guy Pearce in the role of scientist and inventor, Alexander Hartdegen, who is determined to prove that time travel is possible. His determination is turned to desperation by a personal tragedy that now drives him to want to change the past. Testing his theories with a time machine of his own invention, Hartdegen is hurtled 800,000 years into the future, where he discovers that mankind has divided into the hunter - and the hunted.