Heather Green kindly shared this with me. She made it for friends about a decade agao she says.

I an so plesed that Heather and I are now working together on the Severn Estuary element of her Tidal Timespace project. See here for that.

See here

This is from the web site Five Books.

Click on the image below to jump to the page, which includes a discussion of each book, and of Nicholson’s books.

Click here to see a list of books about tides on this website.