To be completely honest, I'm reading Queinnec's book at the moment, and don't know the others first hand. They're just on my reading list.

Lisp in small pieces is a fantastic book for Lisp implementers. It starts off with a simple eval and then increases in scope and complexity. It's very complete. You can see the contents in PDF here: http://assets.cambridge.org/97805215/45662/toc/9780521545662...

Allen's book is considered a definite classic, though, and has a sizeable (and perhaps, aging?) fan base.

NB. While Lisp in Small Pieces is very, very good, it's not actually complete as it doesn't cover garbage collection at all, which is a bit of a shame.