Recently , we studied the chemical evolution of lithium in the thin disc of the Milky Way . We found that the best agreement with the observed Li abundances in the thin disc is obtained considering novae as the main source of lithium . We assumed a delay time of \approx 1 Gyr for nova production and an effective ^ { 7 } Li yield of 1.8 ( \pm 0.6 ) x10 ^ { − 5 } M _ { \odot } over the whole nova lifetime . The possibility to check our detailed assumptions on lithium production on other stellar systems , such as the satellites of our Milky Way , is seriously hampered by their distance from us . In these systems dwarf stars ( where the original lithium can be measured ) are too faint to detect lithium lines . However , thanks to the Gaia mission , it was recently possible to disentangle the stars of a disrupted dwarf galaxy in the Galactic halo ( called Enceladus or Galactic sausage ) . Adopting a chemical evolution model tuned to match the metallicity distribution function of Enceladus stars , we present our predictions for the lithium abundance of the stars of this disrupted galaxy .