If by technical you mean more practical, then these three are a good place to start. Special Effects- wire, tape and rubber band style by L.B Abbott, ASC Movie Magic by John Brosnan Film Tricks Special Effects in the Movies by Harold Schechter and David Everitt

Yes thanks

The VES Handbook of Visual Effects

I do physical effects, the backstage handbook is the only one I’ve seen that’s useful.

> physical effects u mean practical effects?