This is excellent for GMs. If your campaign takes place on the Spinward Marches (the default setting), Volume 1 is essential because the Aslan and Vargr are constant neighbors.
The modern update is structured around two primary hardcover volumes, each available as print-on-demand and high-fidelity PDFs. traveller aliens of charted space pdf upd
– Attention, Travellers. The Third Imperium just got a little more crowded. This is excellent for GMs
The design and portrayal of traveler aliens vary widely across different works and games. In "Traveller," for example, alien species are often characterized by their psychological and physiological profiles, which influence their societal structures, technological achievements, and interactions with other species. This approach allows for a nuanced exploration of what it means to be intelligent, sentient, and capable of interstellar travel. " for example