Hi,
Sure, you could continue the recording, and then use the free version of WavePad to join them all together.
I would personally though, make each chapter or so (maybe every 10mins) a new recording (or use WP to chop them up) This would allow you to either,
1 – Have a folder on your portable music player with small concise chapters
or/ and
2- Place these multiple recordings into a burning application set to “Audio-CD"
Both allow you to quick flick through each book by pressing the “next track” button, on mp3 player / CD player respectively.
Cheers
M