Update SESSIONS.md

SESSIONS.md

@@ -8,13 +8,14 @@ An sign-up link will be sent out via Slack, as well as our [mailing list](https:
 
 | Upcoming Sessions                                        | Discussion Material                   |
 |----------------------------------------------------------|---------------------------------------|
-| [14.12.23, 12:00](./Sessions/2023/12-23-session.md) | [Escape from Model Land: How Mathematical Models Can Lead Us Astray and What We Can Do about It](https://www.ericathompson.co.uk/books/) |
+| [TBC]() | [TBC]() |
 --------------
 
 You can see a record of what we have discussed here:
 
 | Previous Meetings | Discussion Material |
 |-------------------|---------------------|
+| [14.12.23, 12:00](./Sessions/2023/12-23-session.md) | [Escape from Model Land: How Mathematical Models Can Lead Us Astray and What We Can Do about It](https://www.ericathompson.co.uk/books/) |
 | [19.09.23, 12:00](./Sessions/2023/09-23-session.md) | [Good Data: An Optimist's Guide to Our Digital Future](https://gooddataguide.com/) |
 | [15.05.23, 12:00](./Sessions/2023/05-23-session.md) | [Weapons of Math Destruction: How Big Data Increases Inequality and Threatens Democracy](https://mathbabe.org/) |
 | [28.02.23, 12:00](./Sessions/2023/02-23-session.md) | [Bad Data: How Governments, Politicians and the Rest of Us Get Misled by Numbers](https://www.hachette.co.uk/titles/georgina-sturge/bad-data/9780349128603/) |