Types of ticket, pp. 245-46
In January 2025 major changes to tickets in Paris and the Ile de France came into effect.  Cardboard tickets will be phased out by the end of 2025 and replaced by two flat-rate tickets for the whole region, loaded onto a plastic or virtual card called Navigo Easy. A Paris métro ticket now costs 2.50€ and will take you anywhere in Paris and the Ile de France by train. You will need a separate ticket for any bus or tram in Paris or the Ile de France, costing 2€. The best detailed guide to the changes in English is on the Secrets of Paris website, https://secretsofparis.com/practical/getting-around/public-transportation/

Moret-sur-Loing
p. 144 I re-visited La Porte de Bourgogne restaurant in July 2020. It has changed hands but the food and prices are still reasonable and it is very popular. I advise you to book if you want a table outside on a sunny weekend. Understandably slow service, friendly overworked staff. Open daily except on Mondays. The new tel no is 01 64 22 96 26.
The Auberge de la Terrasse has closed down.

The islands of Créteil
See Discovering the hidden islands of Créteil blog post, 8 August 2021

Champs sur Marne
pp. 224-225
The footpath along the river near the Menier buildings now has a temporary fence beside it, following flooding in 2017. It has gaps allowing access to the main park but access from the Chemin de la Rivière to the riverside footpath is now barred. However, I found it quite easy to climb over the footbridge leading to the Cathédrale on the island and jump down on the other side.