|W E Ray|
Is there a Paizo book of Summoned Nature’s Ally stat blocks?
Just the Bestiary, as far as I know. That's all you need for the core list, unless you have a feat, item, archetype, etc., that changes your summoning list or augments your summons in some way.
Or Minis tokens?
There is a Summon Monster pawns set, which has a lot of overlap with the SNA list, but you'll be missing things like fey, giants, plants, and magical beasts. (The Bestiary box presumably has them all, excluding the Gargantuan/Colossal ones, but costs more.)
Or strategy/ guidance? Any products that really help someone with a Summon Nature’s Ally build — and Wild Shape while we’re at it?
Strategy? I can't help there. But I have compiled a bunch of reference tables for polymorph spells, including abbreviated creature stats for assumed forms. Those pages don't cover 100% of all Paizo sources, just what my collection contains. I haven't used these tables much myself yet, but at least one druid-obsessed friend of mine has found them invaluable. (Her playing a druid in my very first PF campaign was the impetus for starting those pages.)
|W E Ray|
It's not perfect, but I currently just use my smartphone and d20PFSRD. I keep my phone's browser on the Summon spell, which lists the creatures available by level, and each creature has a link. Similar to the AoN, but I find the d20PFSRD version a little easier to use.
The AoN version has all those "alternate" summons from the various feats (that I don't have) and for some reason puts the basic list of creatures that can be summoned at that level AT THE BOTTOM of the list, so you need to scroll through everything to get to it. However, if you need those alternate lists, AoN has that advantage.
More importantly, the AoN version just links to the basic creature entry (so a "Celestial Dog" just links to "Dog") and you need to figure out any changes due to template and/or Augmented Summoning. d20PFSRD, while it has its issues, generally provides a stat block that includes the celestial/fiendish template AND both the normal and Augmented Summoning version of the creature.
For example, on d20PFSRD, the dog stat blocks (in part) say:
hp 6  (1d8+2) [1d8+4]
Fort +4 [+6], Ref +3, Will +1
Melee bite +2 [+4] (1d4+1) [1d4+3]
The part in [X] are the Augmented Summoning version.
Odd thing is that if I use my smartphone browser, the links take me directly to the Summoned version, but if I use my desktop computer, the links are like AoN in that they take me to the basic creature - not sure why its different, but d20PFSRD has a bunch of quirks.
|W E Ray|
The maker of the pathbuilder app created an app called Master Summoner for Android phones. Super useful. Pathbuilder is even better for what it's worth.
I just paid the $2.99 for the app and tried it out. It works wonderfully! I like how I can apply my feats, like Versatile Summon Monster and get the proper stats for the creature taking into consideration the template being used.
With AoN, you get the basic stats only, and YOU have to apply the template and modifiers for augmented summoning, etc.
With d20PFSRD, it provides the stats for normal vs Augmented Summoning and for the Celestial/Fiendish templates. Anything else you need to figure out.
With Master Summoner, you can apply the various summon feats AND any of the available templates. It also rolls attacks for you if you want that. Need an Aqueous Eagle with Augmented Summoning? DONE!
Very happy to find out about this little gem!
EDIT: And it has both Summon Monster AND Summon Nature's Ally options, though I only looked at the former as that's what I'm using right now.
EDIT 2: And it includes Summon Minor Monster too!
Oh man, now I can use Summon Minor Monster to summon 1d3 FLYING SKUNKS! They fly around and spray musk on my enemies! DC11 Fortitude save or be nauseated for 1d4 rounds, then sickened for 1d4 rounds. Even if they save, they are sickened for 1d4 rounds. Great against creatures using Scent as a sprayed creature can't use their Scent ability so long as it's affected!