Henry Gee writes: I'll be talking about my book 'The Science of Middle-earth' at Joseph's Bookstore in London on Tuesday 12 July at 8pm. Joseph's is located at 1257 Finchley Road, Temple Fortune, London NW11 0AD (tel 020 8731 7575, fax 020 8731 6699, email) Tickets: £9.95, to include talk, discussion, meze and a glass of wine. So you get dinner *and* a show. Tickets are selling like hot lembas so booking is essential.