In reply to nickh1964:
The best guidebook for pure VF is published by Rother. It's only available in German unfortunately but it is easy enough to follow.
https://www.amazon.co.uk/Klettersteige-Julische-Alpen-Karawanken-Kletterste...
"Mountaineering In Slovenia" is great for pictures and inspiration but vague about difficulty. You can't tell the difference between a walk with a few stemples and a proper vf from the text.
https://www.amazon.co.uk/Mountaineering-Slovenia-Julian-Kamnik-Savinja/dp/9...
The Cicerone guide is probably better for information but rubbish as hill porn - the pictures are terrible.
For climbing the only source of info about mountain trad routes is "Popular climbing routes in Slovenia".
http://www.climb-europe.com/rockclimbingshop/Popular-Climbing-Routes-in-Slo...
It's a good book, but unfortunately comes as a hardback. I see there is now an ebook version which looks potentially interesting if it can go on a phone...
And the latest version of the sport guide... http://www.climb-europe.com/rockclimbingshop/Slovenia-Sports-Climbing-Guide...
As I said earlier I got stitched up when I tried a route out of that, but it seems it may have just been a toughly graded crag. Physically this book is a bit of a doorstop - one rare case where you may be better off with the much more compact older edition.
For maps, the Sidarta 1:25k series are so much better than the older maps that you shouldn't consider anything else.
As of last september all of these were available in the bookshop at the alpine museum in Mojstrana. The museum itself is small but very good and is certainly a worthwhile rainy day option.
Deciding between the Bled and Kranjska Gora side shouldn't be a major issue as you can drive between them in about an hour.
Post edited at 10:11