For those starting A levels and seeking accessible resources on special and general relativity, several book recommendations emerge. For special relativity, "An Illustrated Guide to Relativity" by Takeuchi is noted for its clarity, while "Spacetime Physics" by Taylor and Wheeler is also suggested, though it may be more advanced. Free online resources are available, such as those listed on The Assayer website. In terms of general relativity, "General Relativity from A to B" by Geroch offers a simplified approach but has a limited scope. Another option is "Exploring Black Holes: Introduction to General Relativity" by Taylor and Wheeler, which also focuses on specific topics. For a more comprehensive understanding, "Gravity: An Introduction to Einstein's General Relativity" by Hartle is recommended, although it may be too challenging for beginners.