The letters look like "something old, something new". I love the way individual letters are 'reaching out' in the space around them with delicate curves. I also like the weird color-blocking; it fits with the message as a whole.
The New York Trilogy is a series of novels by Paul Auster. Originally published sequentially as City of Glass (1985), Ghosts (1986) and The Locked Room (1986), it has since been collected into a single volume. Ostensibly presented as detective fiction, the stories of The New York Trilogy have been described as "meta-detective-fiction", "anti-detective fiction", "mysteries about mysteries", a "strangely humorous working of the detective novel".