I feel the mentor cookbook very good ,hope you also find it useful
https://verificationacademy.com/cookbook

Fantastic (free )UVM online training from Aldec
http://www.aldec.com/en/onlinetraining/1/1/2


Found these links helpful in learning about UVM
http://cluelogic.com/category/uvm/
http://www.youtube.com/watch?v=2ZkoiuxUvls

There are a lot of(~24 Videos) short UVM Videos on Youtube , i find this good

http://www.youtube.com/watch?v=V-pekia4SPM

Good Video on TLM

https://verificationacademy.com/sessions/how-tlm-works/video/246?play=1

Very good paper on Factory patterns, best explained here

The OVM/UVM Factory & Factory Overrides How ... - Sunburst Design