Halo books plus 3 book box set
Halo books - Primordium, Glasslands, Cryptum, Ghosts of Onyx, box set Contact Harvest, The Cole Protocol, Ghosts of Onyx ( I ended up with 2 different paperback versions of Ghosts of Onyx by accident) All of these can be bought individually, each individual book for $10 and the box set of 3 for $20 all are used with worn edges but all readable