Please check if your question isn’t answered below or answered here. Otherwise, feel free to ask me anything.

FAQ:

→ Was Carroll on drugs when he wrote the Alice books?
Carroll wasn’t on drugs while writing the story. Alice in Wonderland was invented when he was on a boat trip with Alice Liddell (the inspiration for the story) and her sisters. He invented it while he rowed to entertain them. The drug rumor was originated from psychiatrists who introduced LSD into our society, and first spread in the 60’s by supporters of the (then) new LSD subculture. No evidence has ever been found that linked Carroll to drug use. Even in his diaries, Carroll has never made any reference to the use of drugs.

→ Was Carroll a pedophile?
No. He liked little girls at a level that was more than normal, but there is no evidence at all that he was sexually attracted to them. When his child-friends grew up, they told only positive stories about their warm friendship. He did photograph them in the nude, but only with permission from their mothers, and only if the children were okay with it. Plus, in the mid 1800s making nude photographs of children wasn’t uncommon, all Victorian artists did studies of child-nudes. He made sure that after his death those pictures were destroyed or returned to the children to prevent them from getting embarrassed. It is suggested that Carroll loved little girls so much because he had many sisters which he loved to entertain when he was a young boy.

→ Is Alice in Wonderland about drugs?
>No, it’s actually all about math. For example, take the chapter Advice from a caterpillar. Alice has fallen down the rabbit hole and eaten a cake that has shrunk her to a height of just 3 inches. The Caterpillar enters, smoking a hookah pipe, and shows Alice a mushroom that can restore her to her proper size. But one side of the mushroom stretches her neck, while another shrinks her torso, so she must eat exactly the right balance to regain her proper size and proportions. The word hookah is of Arabic origin, like algebra. The original Arabic term for algebra, widely known and used in the mathematical community in Dodgson’s time, was al jebr e al mokabala or “restoration and reduction”, which exactly describes Alice’s experience. 

→ Why is a raven like a writing desk?
Originally the riddle had no answer, but Carroll made one up later: Because it can produce a few notes, tho they are very flat; and it is nevar put with the wrong end in front! He misspelled “never” intending to spell “raven” backwards.