When the Advanced Class Guide came out, one of the major hybrids a large number of people were surprised to find missing was a Rogue/Caster combination. Fortunately, Marc Radle and Kobold Press have filled that hole, and they've done so with flair and skill.
The Trickster, clearly inspired by and borrowing elements from the Arcane Trickster PrC, is a 20 level base class that elevates and enhances the ideas embodied by the Arcane Trickster and makes the concept playable right from first level. The Trickster features a 3/4 BAB, 6+Int skills, good Reflex and Will saves, 6 level Int-based arcane spellcasting that works similarly to the casting system seen in the Arcanist class, and sneak attack scaling up to 7d6. In addition to these solid mechanics that form the functional skeleton of the class, the Trickster also gains Trapfinding, bonuses to thematic skills, evasion, a pseudo Spellstrike ability called Sneakspell that can be used with melee sneak attacks, three bonus feats, Uncanny Dodge and Improved Uncanny Dodge, Ranged Legerdemain as the Arcane Trickster, Filch Spell which allows him to attempt to redirect an enemy's spell, and the Master Trickster capstone, which allows him to treat all 1's and 2's on his sneak attack dice as 3's and apply a metamagic feat he knows for free when using his Sneakspell ability.
In addition to the class features mentioned above, the Trickster also selects a Forte at 2nd level. The Forte the Trickster chooses gives him a packet of abilities that help customize him and enhance his abilities within a certain area. The Fortes available are:
Overall, the depth and potential of this class is really impressive to me, and I'm looking forward to spending more time playing with the numerous characters this class enables. I strongly recommend this to anyone who's a fan of the Arcane Trickster class, anyone who found themselves missing a skilled/caster combo from the ACG, and really anyone who likes the idea of an effective and versatile class that offers a broad array of potential character builds.