The Algebra of Ice (novel)

was the sixty-sixth novel in the BBC Past Doctor Adventures series. It was written by Lloyd Rose, released 6 November 2004 and featured the Seventh Doctor, Ace and Brigadier Lethbridge-Stewart.
This is the first Past Doctor Adventures novel to feature this line up of Doctor, companion and Lethbridge-Stewart.
== Publisher's summary ==
A genius maths nerd, a weird webzine publisher, and the Doctor's old ally, the Brigadier, find themselves helping the Doctor and Ace solve what should be a simple puzzle: the appearance of a crop circle in the Kentish countryside.
Hardly uncommon. But there are some peculiar features. It's not a circle but a series of square-sided shapes. It's filled with ice. And it draws the Doctor and Ace into a confrontation with a reality right next to zero.
== Plot ==
to be added
== Characters ==
* Seventh Doctor
* Ace
* Brigadier Lethbridge-Stewart
* Ethan Amberglass
* Adrian Molecross
* Clisby
* Patrick Unwin
* Sheridan Brett
* Sergeant Ramsey
* Jessica Tilbrook
== Worldbuilding ==
* Paul Erdős is considered to be "the last of the great abstract thinkers".
=== Foods and beverages ===
* The Doctor drinks orange juice and serves buttered toast and honey to Ace and Ethan for breakfast.
* Ace drinks hot chocolate. She also likes beer and gets drunk here.
* The Brigadier starts the day with coffee.
* The food machine makes Bourneville Fruit and Nut bars on demand.
== Notes ==
* This novel had an illustrated preview in DWM 347. It was illustrated by Daryl Joyce.
== Continuity ==
* The Doctor recalls destroying Skaro, (TV: Remembrance of the Daleks) but also mentions he hasn't destroyed his own homeworld. (PROSE: The Ancestor Cell, TV: The End of Time)
* The Brigadier is familiar with Seventh Doctor and Ace is familiar with the Brigadier. Ace refers to UNIT taking unnamed individuals to a secret prison and she presumes they are still there, a likely reference to Morgaine and Mordred. (TV: Battlefield) Ace also mentions Fenric. (TV: The Curse of Fenric)
** These details place this novel during or after 1997. (PROSE: The Dying Days)
* Visiting Ethan Amberglass whilst in hospital, the Doctor mentions that he has just visited both his own mind and the Moon. (PROSE: Timewyrm: Revelation)
* Earlier in his personal timeline, the Seventh Doctor visited Pompeii on 23 August 79 AD in the company of Melanie Bush (AUDIO: The Fires of Vulcan) and would later do so again in his tenth incarnation in the company of Donna Noble. (TV: The Fires of Pompeii)
* The Doctor mentions the destruction of the Earth in an alternative universe. (TV: Inferno)
== External links ==
* 
* The Cloister Library: The Algebra of Ice
Category:PDA novels
Category:Seventh Doctor novels
Category:2004 novels
Category:Brigadier Lethbridge-Stewart novels
Category:Stories set in 1963
Category:Stories set in 1849
Category:Stories set in 1912
Category:Stories set in 79
Category:Stories set in the 20th century
Category:Stories set in Shoreditch
Category:Novels set in the United States
Category:Stories set in Italy
Category:Stories set in Pompeii
Category:Stories set in Kent