Per 
SCP-5215 as it was discovered in the home bookbinding studio of ██████████████
Item #: SCP-5215
Object Class: Safe
Special Containment Procedures: SCP-5215 is to remain encased in the custom-fitted oak box built especially for its containment. Replacement containment vessels can be constructed of any material so long as they are of virgin origin and do not contain any post-consumer products.
SCP-5215 must not come into physical contact with any materials containing printed, drawn, manuscript, or otherwise physically-recorded written content. Retrieval for experimentation purposes must have the approval of two (2) Class 4 personnel who have each comprehensively reviewed any and all written materials intended for use with SCP-5215 in advance, according to Experimentation Procedure 5215-A.
Description: SCP-5215 is a beige, cuboid slab of lithographic limestone, also known as lithostone, weighing 12.18 kg and measuring approximately 40.8cm x 24.9cm x 9.8cm. The stone is highly polished on its two largest faces and shows irregular rough chisel marks on its shorter faces. Stones of this sort are often used in the hand-bookbinding trade for leather-paring; SCP-5215 shows expected examples of small scratches and abrasions which are not believed to be linked to its anomalous properties.
When printed materials are brought into contact with SCP-5215 and then altered, such as they might be if the stone were used for normal bookbinding work, the content of the printed materials is manifested in the physical world (See Event Log 5215-K). The method by which these manifestations are achieved is unknown, and their inexact nature makes controlled experimentation incredibly dangerous if not impossible. The memetic potential of these changes is demonstrated in the manifestation of abstract content, such as the dates, persons, or places involved in certain historical events. In these cases, public perception of these events is molded to match the changes initiated by the stone, though it is yet uncertain whether the events themselves are altered after the fact. A suspected link exists between the manner and degree of alterations to the printed material and the manifestations such experiments will produce, i.e. repairing or stabilizing the material will render its contents improved or enhanced in the physical world, and destruction of the printed material will cause exaggerated decay and/or recession from humanity's consciousness.
Addendum 5215-A: SCP-5215 was initially recovered on ██/██/████ by Foundation personnel after a series of incidents linking the anomalous properties of SCP-5215 to ████████████, a small hand bookbinding business in Northern Ireland. The business owners (Non-Anomalous Subject 5215-2) had reportedly used the stone regularly in the course of their work before recognizing that the anomalous events caused by SCP-5215 were related to books they had previously worked on. Upon confirming NS-5215-2's home as the current location of SCP-5215, the Foundation found the site and all of its contents, including SCP-5215, already abandoned. The location and containment of NS-5215-2 are ongoing and considered Level 3 priorities.
Addendum 5215-B: Further investigation of SCP-5215's recovery site turned up several documents logging the thoughts and actions of NS-5215-2 in the form of journals, spreadsheets, and business proposals recovered from their private laptops. These documents suggest that NS-5215-2 originally acquired SCP-5215 from an abandoned warehouse (Site-5215-1) several miles from the recovery site which had previously housed another hand bookbindery. The proprietors of this earlier, unnamed business (NS-5215-1) apparently abandoned the warehouse and its contents prior to the arrival of NS-5215-2.
After acquiring SCP-5215, NS-5215-2 continued to work normally, unaware of SCP-5215's anomalous effects until several months later. Upon recognizing a link between the books they repaired during the normal course of their work and a series of unlikely news stories, they believed themselves to be capable of altering the fabric of reality, though they did not associate this ability with SCP-5215 specifically.
Over the next several months NS-5215-2 conducted business as usual, though work logs and personal text messages illustrate their ever-increasing belief in their manifestation capabilities, even regarding events believed by the Foundation to be unrelated to SCP-5215. Nevertheless, significant evidence exists tying the activities of NS-5215-2 to a series of anomalous events taking place between ██/██/████ and ██/██/████.
On ██/██/████, NS-5215-2 are believed to have worked on a book called [REDACTED] using SCP-5215, triggering Event-5215-Taurus and the deaths of nearly 4,000 people over the course of several hours. Aware of their involvement in the disaster, NS-5215-2 tried to revert the changes but were unsuccessful. It was this event that led the Foundation to the target ████████ as a potential site of anomalous activity.
The regularity of NS-5215-2's documentation decreases dramatically after this date, with only a few scattered journal entries and no additional work logs available. The journal entries are written in a scrawled, unsteady hand and relay little concrete information. One such entry is comprised of only the phrase "We should've let them go." repeated across three full pages.
In the journal's final entry, dated ██/██/████, NS-5215-2 records visiting Site-5215-1 in an attempt to discover the source of SCP-5215's effects. While there, NS-5215-2 finds a notebook presumed to belong to NS-5215-1 before they abandoned the site. An entry in the notebook revealed that NS-5215-1 acquired SCP-5215 from an unnamed antique store somewhere in London. NS-5215-2 records that the notebook's early pages contain detailed descriptions of a town uncannily similar to ████████, though it is never mentioned by name. It's generally held by Foundation researchers that at some point shortly after acquiring SCP-5215, NS-5215-1 unwittingly used SCP-5215 as a writing surface while brainstorming an ideal location for their new business, activating SCP-5215 and bringing the town of ████████ into existence before subsequently "discovering" and moving to it.
Other evidence detailing the activities of NS-5215-1 is lacking. It's presumed, however, that several years after they abandoned their enterprise, NS-5215-2 moved to █████████ and discovered Site-5215-1 and SCP-5215 by chance.
