>>96496872
there are 3 dedicated AL novels

Shroud of Night - pure dumb cawadooty bolter porn about how cool and badass Alpha Legion are

Sons of the Hydra - classic AL, schemes and plans but with the twist that the AL themselves are so emmeshed in secrecy and schemes it has become deceptively easy to trick them

Renegades: Harrowmaster - very fun book about one AL guy being like, "guys, we're very good at being sneaky and tricky, but at some point we should try winning a war" and bringing together several warbands to go do that. The different warbands almost feel like intentional license for you to build an AL army that is dedicated to a god or has lots of tanks or whatever.