For someone who wants to think about the ideas of evolution without the biblical/Christian views included in the package, two spring to mind.
Evolution: A Theory In Crises by Michael Denton. A lot of technical issues with evolution discussed by a non-Christian molecular biologist. A few years old now but still a good read.
Darwin On Trial by Phillip Johnson. Very good introduction to some of the main problems with evolution. Not very in depth but made a big impact as it put lots of widely known info in the one place for the first time. An easy read. No Christian agenda pushed here either, just arguments for intelligent design.
One piece of advice I would give very strongly is to look at the facts and be honest. What I mean by that is that it's very easy to be swayed by what you want to be true and by other people's opinions and pressure. Evolutionists are often militant and aggressive and use any tactics to take your eyes off the facts and discredit scientists who do not bow to Darwin. You'll see it everywhere. What you need to do is cut through all the crap and look at the actual facts.