Although mary isn’t fond of reading, she read harper lee’s to kill a mockingbird, and she found it fascinating. is it a simple sentence compound sentence complex or compound complex sentence

Hi !!

It's a compound complex sentence

Although Mary isn't fond of reading makes it = complex (dependent clause)
she read Harper Lee's To Kill a Mockingbird, and she found it fascinating = compound (2 independent  clauses)

hope I helped !