My recording vs. Audiobook

Yours are very asymmetric - this means that the positive peaks are a lot bigger than the negative ones. And from the waveforms, I'd say that yours can't be as loud as the published one, for two reasons; you haven't used all of the available headroom, and the published one looks as though it's been limited, so that the peak levels aren't that much louder than the mid-range parts - which is quite good in a book reading.

There are several potential reasons for the asymmetry; dodgy mic and sound device, and also breath control can come into it. With the mic, it generally means that your breath (rather than your speaking) has displaced the mic's diaphragm forwards. I've known this to happen with ribbon mics, but they aren't generally used for this purpose, so I don't suppose that's it. There are also a couple of ways to correct the issue, so you can get the full recording depth back, but you really shouldn't have to use those. What mic and sound device are you using?