The PDF starts off with a brief description of what the series(Into the Breach) is about and then the table of contents. Before this is the cover art and a quote from [i]The Art of War[/i] that I think is really fitting for the class. Well done there.
Right after that we get to the archetypes.
Aetheric Marksman is an Aether Kineticist archetype that allows you to use a longbow or shortbow(with which you are proficient now) to make your Telekintic Blast. The damage you deal changes and feats like Rapid Shot don't work with it, but Weapon Focus(Kinetic Blast) works. The range is 60ft though, not the full increment of the bow, but any enhancements on your bow(like Flaming or Holy) apply and later you get the ability to grant your bow special properties too, albeit in exchange for taking burn. Later class features include turning arrows into small area of effect damage, piercing through a target to hit another and deal bleed, and shooting an arrow that digs itself deeper into the target.
Archetype Opinion: Not a bad archetype, but unless you can use Gather Power on the features that require burn(which I think you can, but I'm not sure) I don't see it being an all day use class.
Hellfire Kineticists(only available to devil-spawn tieflings) start off with an amazing ability: Half the damage of their fire blasts deal unholy damage. The second ability is an infusion(replacing first level infusion) that sickens or nauseates depending on if the target makes their save.
The part that makes me really hesitant is giving up elemental defense and a bunch of utility talents for being treated as an Outsider(Evil) and scaling bonus to fire and poison effects. Fire's Defense isn't good enough to warrant keeping it, but you can't gain one from any other element.
Later abilities include being able to know if someone has comitted an evil act and what it was, an imp familiar, and a pretty cool capstone.
Archetype Opinon: Pretty cool and evocative. It's a pretty neat archetype that is NOT evil only. Good job on this one, FPG!
Wind Whistler is an Air Kineticist archetype. I'm not so sure about it's first ability, which deals damage based on your Perform(wind) checks instead of adding your Constituion modifier. It's interesting, but skews damage a bit.
Next [i]all[/i] infusions are given up in exchange for getting bardic performances, including two unique to the archetype. Both are really cool, especially the one that allows you to give your Enveloping Winds to someone else! The rest of the abilities are equally good as well, with my favorite being trading your composite blast(you must choose Air are your expanded element) for a bardic masterpiece instead. You only get one though, but you can switch it out for free at 12th and 17th level for another one.
Archetype Opinion: This is just great. Without a doubt my favorite of the three archetypes. I'd have gone into more detail on describing the rest of it's abilities, but there are a lot and I don't wanna spoil them for anyone. :)
Prestige Classes: A sorely lacking option for kineticists so far. We get two in this PDF.
Aetheric Assailant is the Eldritch Knight of Kineticists, though it's a bit harder to get into(five feats[though on is armor proficiency], at least 3rd level kineticist, and one infusion).
It has full Base Attack Bonus and can use kinetic abilites(supernatural or spell-like) while Raging, which is a nice touch. You don't have to be a barbarian though, as even under the effects of the spell [i]rage[/i] you can use your abilities.
It also has the ability to add ther weapon damage dice(if using one) to their Kinetic Blade, but it comes at a hefty price: you target normal Armor Class and take cumulative burn for each attack beyond the first you make. Yikes!
It does get better from their though, with other abilities like your prestige class levels counting as kineticst and your martial class level for feats, channeling your Aether blast into your shield and/or armor, and even wielding one(or more!) weapon from afar. The capstone is being able to accept 1 extra point of burn in a round and free trip attempts when you confirm a critical hit.
Prestige Class Opinion: Pretty nice. I love prestige classes that you multiclass for, and Aetheric Assailant is really well made and balanced. I'd certainly play one.
Cerulean Star is for Pyro Kineticists that expanded into Fire twice. It's a five level prestige class that requires you to have Blue Flame blast to qualify. The weirdess bit is that Cerulean Stars gain proficiency with starknives. I mean, I get it, Star is in the name, but come on...
This prestige class is all about destroying undead. Your blast deals more damage against undead, you gain Kinetic Healer without needing Aether or Water that later can fix conditions like nauseated, setting undead on 'fire' that deals holy damage, and the capstone ability reduces your current burn by one every time you use Cerulean Fire to destroy an undead. I feel like that should've been the fourth level ability though, since their Heavenly Radiance ability at level 4 allows you to make your Cerulean Fire deal either full Holy damage, half Fire and half Holy, or full Fire damage as you choose. That's amazing.
Prestige Class Opinion: For what it does this prestige class does it well. While it is good at destroying undead it also has potential for fighting other kinds of evil creatures. It's a lovely class that has it's place in just about any campaign.
Now we move on to the new Elements.
Bone, first, is very creepy. It should be. Talents you can pick up include causing bones spurs to erupt out of the ground or give your blasts the [i]ghost touch[/i] quality. The defense is pretty thematic too.
Chaos is next and it have a [i]very[/i] unusual blast. First it is treated as [i]bane[/i] against Lawful subtyped creatures, deals no damage to Chaotic subtyped creatures, and changes damage dice into d20s and d12s as it increases. Whoa, weirdness! The defense gives you bonuses to avoid being grappled and getting out, lower armor check penalty, and gives you fortification that stacks with elemental overflow.
Crystal's defense is one that doesn't scale. Not by accpeting Burn, anyway. It gives you an armor bonus to your Armor Class and Touch Armor class that's based off of Con, and can blind those that hit you, no save, for a round. Crystal also has neat talents like increased crit range, bleed damage, and deflecting rays.
Dream is another with a neat blast. Think [i]shadow evocation[/i] but mimics other kinetic blasts instead. Need fire damage? Use it. Targets do get a will save for drastically reduced damage, and its mind-affecting so immunites and resistances apply. It's defense lets you continue to function if something makes you fall asleep, and you can accept to gain bonuses against mind-affecting spells and effects. It's not all nice though, as one utility talent is [i]phantasmal killer.[/i]
Time has two different blasts, one for aging others and another to throw weapons like a TK blast. It's defense is a Dodge bonus you can accept Burn to increase. It has a utility talent for running or charging up walls and across ceilings, so you have some nice movement options too.
There is a great section about Spark of Life and the new elements, and feats after that like treating one elemental defense as already having one point of Burn, or qualifying for any item creation feat. Kineticists making potions of Mage Armor and wands of Fireball are possible now, and that's great.
One feat really stands out as a way to act like you are less of a threat or be more careful with your damage. Merciful Blast treats any blast damage as non-lethal and you can reduce the damage you deal like you were a lower level than you really are. This is great for a few reasons, like a villain working with the party and not want to reveal the extent of their power.
After that there are sections for magical and mundane items, a quick glance of which really fit and looks nice.
All in all this is a great pdf that expands on the kineticist in ways I feel have been needed while also being different from other books.