All right, you know the drill - 3 pages, 1 page front cover, 1 page editorial/SRD, 1 page content, so let's check this out!
Invisibility is one of the spells that is just awesome - DMs have fun with it, players love it and this BP expands the potential of the spell further via feats:
-Focused Invisibility: Enables you to focus invisibility on an item that can be worn and taken on and off or passed around - very cool, as it lets you become invisible, get to a foe, take of the item, eliminate him and then put the item back on. Similar tactics are possible. VERY cool and imaginative feat.
-Lingering Invisibility: Another winner, this feats lets you halve the spell's duration with a cool additional effect - if the spell ends due to you attacking etc., you still remain invisible until the beginning of the next turn. Oh, the potential for nailbiting assassination attempts and the scampering for cover - glorious!
-Invisible Auras: This is yet another spell that is pure awesomeness - if under invisibility and succeeding at stealth-checks vs. perception, you may also hide magical auras from items you carry etc. - FINALLY! A spell to help against those unpleasant divination spells!
-Unsensed Item: The most complex of the feats, this one makes an item also scentless and silent, quieting e.g. bowstrings. Ammunition stays invisible, while the weapon becomes visible upon attack. Magic items may use their spells as part of the attack that makes them visible. Additionally, feinting with unsensed items becomes much more effective and deadly. Very cool indeed!
Editing and formatting are top-notch, I didn't notice any glitches. Layout adhere sto SGG's 3-column horizontal standard and the pdf has no bookmarks, but needs none at this length. Welcome to the endzeitgeist-sounds-like-a-broken-record party once again! This Bullet Point exhibits not only a mastery of cool rules and stellar crunch-design, but is simply A MUST-HAVE, all killer, no filler, a worthwhile, fun, cool addition to just about every game. beleaguered DMs get a bunch of cool toys for their thieves guilds. PCs get vastly improved more versatile infiltration options. And in the end, these feats also facilitate the use of infiltration missions in your game. These feats should be part of the core-rules/standard invisibility options. Just plain awesome! Final verdict will be 5 stars endzeitgeist seal of approval.