I sometimes find it hard to get to sleep and find it helps to put an audio CD on of a relaxing novel and let it play. Each CD only lasts 40 minutes or something so it's not playing all night and I've usually fallen asleep halfway through. However, my library has started to buy new audiobooks in CD-MP3 format (i.e. a single CD). I don't own a CD-MP3 player and am wondering if you can program them to play only certain tracks? Otherwise the whole book would be playing for 8 hours or something and might wake me up again! I've had a bit of a browse on the internet and come across something called a "bookmark function". Is that what I should be looking for?