A little late to the party, but tossing my item in for some good old fashioned critique!
Tome of the Journeyman Aura moderate divination; CL 6th
Slot none; Price 10,000 gp; Weight 10 lbs.
This large book is filled with insight into all walks of life. It never has the same appearance twice, but always feels familiar to those who have read it. A player who studies the book while focusing on a specific task will be pulled into its pages.
The book can be used to enter a 15-foot-by-15-foot extra-dimensional space that becomes perfectly suited for the desired Knowledge, Profession, or Craft skill check. The space can hold one creature, up to size category Large, at a time. A player can only use the book in a situation where they could otherwise choose to take 10 on a skill check.
The book allows a player to make any Knowledge or Profession skill check untrained. Masterwork tools and pristine texts are readily available and grant a +2 circumstance bonus on any check made inside the space. There are no material components found within. None of the tools or texts may be removed. Only items created in the space may be removed.
The book’s material and design change after every use to better represent the extra-dimensional space that was created. The air surrounding the book changes, and a corresponding scent is generated (i.e. the unique smell of an ancient library when seeking facts lost to time or varying herbs and smoke when completing alchemical processes.)
Construction Requirements Craft Wondrous Item, Breadth of Experience, rope trick, masterwork transformation; Cost 5,000 gp