Just a book with 𝗗𝗶𝗿𝘁𝘆 𝘁𝗮𝗹𝗸 & 𝘀𝗰𝗲𝗻𝗮𝗿𝗶𝗼𝘀. feel free to recommend things. have 𝗳𝘂𝗻.