Audio books

Help! I am not a ‘geek’ but a 63 year old grandma who LOVES her MP3 Sansa! BUT I only use it to listen to audio books. If I load them into the audio book memory  I can’t get them to “play all” which leaves me fiddling in the dark in bed, for the next CD, or having to get up put on the light and look for my glasses, as font is too small to read without them. If I load them into “Music” to ‘play all’ the cd’s load numerically backwards! or in any random order it chooses!!! Fine for music, not so good for a thriller! which again leaves me fiddling about in the dark. Is there an answer out there? regards purplecow47