Type 40 Operational Handbook

Christel Dee had owned and read through a Type 40 Operational Handbook at some point prior to her attempt to take a holiday to Barcelona aboard the Doctor's TARDIS. (NOTVALID: Doctor Who Minecraft)

History
After she found that the console room had been changed to a Minecraft-themed desktop theme and that this had somehow resulted in Christel herself being transformed into a Minecraft character as she came in, her messing with the telepathic circuits caused the Ship to begin crashing towards the planet Minecraftia.

It was then that Christel remembered what she had read in the Type 40 Operational Handbook, advice which helped her land unharmed. As she thought of the book, a "sprite" depicting it briefly materialised next to her, in accordance with her Minecraft environment. (NOTVALID: Doctor Who Minecraft)

Behind the scenes

 * The Type 40 Operational Handbook may be intended to be same thing as the Type 40-specific TARDIS Instruction Manual used by the Fourth Doctor in The Horns of Nimon.