I have a VL for 'To Read'
Code:
Not #finished:>12/31/2000 and formats:true and not formats:other and not #usertags:split_up
finished is a date (2000 is my
abandoned date)
usertags is what it says

, I tag there when I use
Epub Split (PI) on a boxed set
So, if it has a format and not fand any of the other, it represents my (outta control) TBR pile
Once that VL is active, you just use the dice Icon (select a Random Book)
Note: You may need to add it to a
toolbar