The Picard Reading List currently includes the novels and comics which have included references to elements of the wider Lit-verse, or to each other. In addition, a reference in part of Star Trek #400 connects a Picard story from that work.
this list does not have a main storyline, as many of
the other series do, the light blue denotes the expanded storyline of
the television series. Read any or all of these to go a bit deeper.
Hover for notes. As always, not every reference to every other story is mentioned, just the one I chose as most important to show the expanding Lit-verse web.