Based on the information you've provided, the fact that Kiehl's Avocado Eye Cream 28g has a glue-like smell could be a noteworthy sign. While some genuine Kiehl's Eye Creams have specific smells, such as avocado and shea, the glue-like smell is not a normal smell for this product.

If you suspect that this eye cream is not genuine, we suggest that you consider contacting the official Kiehl's customer service or visiting the official website for more accurate information and assistance. In addition, you can also refer to other people's reviews and experiences with this eye cream, which will help you get a more comprehensive understanding of the quality and safety of this product.

About the four horizontal lines on a small book on the bottle, this may be the product's anti-counterfeiting marking, but the exact marking and verification method may vary from product to product. If you want to further confirm the authenticity of the eye cream, we recommend you to consult the official Kiehl's customer service or use the official anti-counterfeiting query method to check.