I bought an entry-level SLR camera Canon 550D and want to learn how to use it. Are there any books on the skills of using SLR cameras? Please recommend it. Thank you.

If you want to learn how to use a camera, you must read through the instructions first. If you want to learn photography, just read the book I recommended for you.

Just like learning to play chess, reading books is just like a master teaching you the routine of attack and defense, and reading instructions are the rules to teach you to play chess.

If you want to learn photography in an all-round way, the "New York Institute of Photography" is the best, and photography is involved in all aspects. It's basically an encyclopedia, so it's regarded as the bible of photography. The book is very thick. If you have time, reading through it will improve your level qualitatively.

If you don't have that much time, I suggest you take a look at the "Simple Introduction to Digital SLR Photography" jointly published by Oak Photography Network and Tencent. This book explains the common models in the domestic market, with strong practicability and many examples, and also combines the common scenes in daily life. Simply put, it is aimed at ordinary consumers and is also very suitable for novices. A lot of photos and data make you not necessarily an expert after reading them, but you can definitely take photos that satisfy you.