I am looking to research and read more about adult learning theory, but there are just os many books out there.

Can anyone recommend a good reference book on adult learning theory? I have been in training for 3 years so it doesn't have to be the bare basics, just a comprehensive overview.

Adults Learning by Jenny Rogers is a really good resource. It's not overly simplistic and provides lots of advice in a clear and accessible way.

Although I despise the whole "pedagogy" vs. "androgogy" debate, I would go for what is considered by many to be THE book about this topic by Malcolm Knowles. If you can get past the whole semantics argument, the meat is quite useful and good.

YMMV, JMNSHO

Hi, yes there is a lot published in this area.
I would include the work of Kolb (lots written about his material, Gardner's theory of multiple intelligence, http://www.peterhoney.com and anything by Dave Meier (Accelerated Learning Handbook )
as starting points

There's also an interesting report about the 70+ inventories on different learning styles (the Coffield report)in post 16 learning. Of course, as Peter Honey has always pointed out, Learning styles are not intended to be prescriptive.

In addition to Jenny Rogers book there are a couple of others I would suggest:

Learn for your Life (Meed, Knasel & Rossetti)
Teaching Adults (Alan Rogers - relation of Jenny?)