Online book catalogue so my dad can

• track what he owns
• quickly determine which books he is missing from a series
• work out where he's stored them

Other features available by request.

There are three complementary reasons for choosing the name Eratosthenes.

1. To remind my dad that cheats never prosper after stealing my answer to this crossword clue

   So earnest, the silly old astronomer (12) [Times Jumbo 396, March 30 2002]

   and attempting to take full credit for it.

2. There's a certain resemblance between Eratosthenes and my dad.

   

3. Fortuitously, Eratosthenes also happened to be the chief librarian at the Library of Alexandria.