£5 Amazon voucher and nothing to read

Clearly this is a problem and solution in one, but I am suddenly uncertain what I actually want to read. I actually can have another one, too, I've acquired enough SwagBucks.

Judith bought Colin The Keeper of the Isis Light for Christmas, so I've just read that, but have never read #2&3, I have the sequal to Friday Night Knitting Club but not the original. I will accept recommendations.

[Poll #1813641]