Kalki Avataar aur Muhammad Saahib (Hindi: कल्कि अवतार और मुहम्मद साहिब) ek kitaab hai jo 1969 mein likha gaya tha. Yah Ved Prakaash Upaadhyaay ne likha hai. Yah ""Saarasvat Vedaant Prakaash Sangh"" dvaara prakaashit kiya gaya tha. Yah hindee mein likha hai. Is pustak mein mukhy roop se tark hai ki islaamee paigambar Muhammad Kalki tha prayaas karata hai. Kalki hindoo shaastron aur puraanon ke anusaar Bhagavaan Vishnu ke antim Avataar hai. Is pustak ke lekhak Hindu aur sanskrit lekhan ka ek vidvaan hai.