Still Plums - Plum Jam and Plum Muffins

Faithfully I keep on using those plums and ... keeping you posted about what you could do. I also checked my cookbooks on what possibilities where available. Well, In fact I only have five books available. All the others are in boxes waiting for a new place to be put.
So, what cookbooks would you keep, if you only could keep five?
To be honest, I just selected four, the fifth one (Tasting India by Christine Manfield) was buried somewhere on my desk and I didn't notice. 
Which four books did I choose then? Cook with Jamie by Jamie Oliver, Bills Sydney Food by Bill Granger, The Little Paris Kitchen by Rachel Khoo and Secrets of Scandinavian Cooking ... Scandilicious by Signe Johansen.
Did they have anything with plums on offer for me?