Hmm where do I start ?
Great Expectations - for me Dickens' greatest work - read it when I was about 14 and it's stayed with me ever since ;
Great plot, glorious language, very funny, deals with love, hate, regret, redemption and more . . . . surely a candidate for greatest ever English novel.
Lord of the Rings - well who doesn't have it as one of their faves.
Anything by A E Van Vogt - a guilty pleasure but, for me, he's a unsung hero of Sci-fi
And a bit left field but "Slaughter of the Innocent" by Hans Ruesch. Emotionally a very difficult book to read but a must for anyone who professes to love animals.
A renowned work published in 1978 Ruesch proves that vivisection is scientific fraud.
And for the nerd in me, one of Porter's fantastic sixth-form maths text books - any will do but perhaps Dakin & Porter "'Elementary Analysis" is my fav. Happy memories.