You don't need the novelization (which has dubious canonical pedigree). She says so in the film:
"They're tracking us! It's the only explanation for the ease of our escape."
Han refuses to consider that the Falcon is being tracked and shuts down the conversation.
"Not this ship sister."
So - she turns to banking on the info in R2.
"I hope when the data is analyzed a weakness can be found. It's not over yet..."
We don't know if she gave up the Rebel base after the Death Star popped Alderaan but it seems clear that she doesn't care that they are tracking themor simply defers to Solo. In fact, in some ways it helps - by bringing the Imperials to them, the Rebels can fight on their terms and territory. Saves fuel costs too...