The secondhand book listing has been updated on the site today. It now contains nearly 4000 titles - so plenty to browse through! This is a fully searchable spreadsheet done in Microsoft Excel, which most people will have bought with their computer, be it PC or Mac. But it can also be opened in freely available programs such as OpenOffice. We have inherited a huge variety of secondhand plus antiquarian books, and we would not like to vouch for each one, but it will certainly repay a look.